Mathematics

MATHEMATICS

VOCABULARY MATHEMATICS

No. Vocabulary & Parts of speech Thai Definition Sentence

NUMBERS UP TO 10,000 1 numerals (n.) ตัวเลข Write the numerals for the number names.

2 five digits (n.) เลขห้าหลัก There are five digits number in 14,095.

3 one thousand (adj.) หนึ่งพัน We write one 1,000. thousand as

4 ten thousands (adj.) หนึ่งหมื่น The value of digit 3 in the ten thousands place is thirty thousands.

5 thousands place (n.) หลักพัน In 3690, the digit 3 is in the thousand places.

6 stand for (v.) มีค่าเท่ากับ In 12468, the digit 4 stands for 400.

7 place value (n.) ค่าประจ�าหลัก What is its place value?

8 arrange (v.) จัดเรียงล�าดับ Arrange the following numbers in ascending order,

9 expanded form (n.) รูปการกระจาย Write 6,093 in the expanded form.

No. Vocabulary & Parts of speech Thai Definition Sentence

10 correct (adj.) ถูกต้อง Fill in the boxes with the correct answers.

11 successor (n.) ตัวเลขต่อมา

12 predecessor (n.) ตัวเลขที่มาก่อน The number that comes just after a given number is called its successor or what comes next.

The number that comes just before a given number is called its predecessor or what comes before.

13 distribution (n.) การกระจาย We know that division is equal distribution or sharing of things.

14 represent (v.) แทน, เท่ากับ The number of each animal is represented by a bar.

15 word problems (n.)

16 following (n., adj.) โจทย์ปัญหา Solve these word problems by drawing model. สิ่งซึ่งตามมา, ดังต่อไปนี้ Which one of the following is correct?

17 counting in tens (v.) นับเพิ่มทีละ10 When counting in tens the number after 245 is 255.

18 decreasing (adj.) ลดลง Arrange the fractions in the decreasing order.

19 increasing (adj.) เพิ่มขึ้น Arrange the lengths in the increasing order.

No. Vocabulary & Parts of speech Thai Definition Sentence

ADDITION AND SUBTRACTION 20 symbol (n.) เครื่องหมาย , , , +, >, =, x, ÷, $, ฿ These are symbols.

21 add (v.) บวก Add 3809 to 6482, the sum is 10291.

22 addition (n.) การบวก Find the sum in addition of 8905 and 608.

23 sum (n.) ผลบวก Add 8950 and 899 to find the sum.

24 minus (v.) ลบ Eight minus five equals three.

25 subtract (v.) ลบ Subtract 3854 from 20000.

26 subtraction (n.) การลบ The answer to a subtraction problem.

27 difference (n.) ผลต่าง An operation that tells the difference, when some or all are taken away.

28 regroup (v.) จัดกลุ่มใหม่ When you regroup, you change the grouping of numbers.

29 without carry over (prep.) ไม่มีการทด Students do some of these additions without carry over.

MULTIPLICATION AND DIVISION

30 multiply (v.) คูณ Four multiplied by three equals twelve.

No. Vocabulary & Parts of speech Thai Definition Sentence

31 multiplication (n.) การคูณ 5 x 6 = 30. This is the multiplication of 5 by 6.

32 product (n.) ผลคูณ

The answer to a multiplication problem is called the product. 33 times (v.) ครั้ง, คูณ Two times ten is equal to twenty. 34 quotient (n.) ผลหาร We write the quotient above the dividend.

One hundred and twenty-five 35 dividend (n.) ตัวตั้ง is dividend of 125 divided by 5. 36 divisor (n.) ตัวหาร Five is divisor of 125 divided by 5.

37 remainder (n.) ตัวเศษ

The number that is left after one whole number is divided by another is called remainder 38 multiplication tables (n.) สูตรคูณ Using multiplication table is to solve the problems.

39 divide (v.) หาร When we divide a number by1, we get the same number as the quotient.

40 division (n.) การหาร We know that division is separation of objects into equal group or sets.

41 long method (n.) วิธีหารยาว We show how division with remainder can be done using the long method.

No. Vocabulary & Parts of speech Thai Definition Sentence

42 short method (n.) วิธีหารสั้น We show how division with remainder can be done using the short method.

MONEY

43 baht (n.) บาท Thai money is baht and stang.

44 stang (n.) สตางค์ The numeral to the right of the dot shows the stang.

45 convert (v.) เปลี่ยน, แปลง To convert baht into stang, we multiply the amount in baht by 100.

GRAPHS

46 pictographs (n.) กราฟรูปภาพ A pictograph represents numbers as pictures.

47 bar graphs (n.) กราฟแท่ง The bar graph shows the amount of money that Susan used in a week.

48 vertical bar graphs (n.) กราฟแท่งแนวตั้ง The bars in vertical bar graph are standing.

49 horizontal bar graphs (n.) กราฟแท่ง แนวนอน

TIME The bar graphs that bars are setting in horizontal line are horizontal bar graphs.

50 duration (n.) ช่วงเวลา What is the duration of the time between 08.00 am and 10.30 am.?

No. Vocabulary & Parts of speech Thai Definition Sentence

51 minute (n.) นาที

The minute hand takes 5 minutes to go from one number to the next. 52 hour (n.) ชั่วโมง There are 24 hours in a day. 53 second (n.) วินาที There are 60 seconds in a minute.

FRACTIONS 54 fraction (n.) เศษส่วน 4 11 is a fraction. It is read as ‘4 by 11’.

55 quarter (n.) หนึ่งส่วนสี่ I would like

1 4 of pizza, or one quarter of it.

56 numerator (n.) ตัวเศษ 9 13 is a fraction. 9 is the numerator of the fraction.

57 denominator (n.) ตัวส่วน 7 15 is a fraction. 15 is the denominator of the fraction.

58 common denominator (n.) ตัวส่วนที่เท่ากัน

59 equivalent fractions (n.) เศษส่วนที่เท่ากัน

60 ascending order (n.) เรียงจากน้อย ไปมาก

61 descending order (n.) เรียงจากมาก ไปน้อย We can add or subtract the fractions if they have the common denominator.

Equivalent fractions are fractions that have the same value but different numerator and denominator.

Arrange the lengths in the ascending order.

Arrange the fractions in the decreasing order.

No. Vocabulary & Parts of speech Thai Definition Sentence

62 simplest form (n.) รูปเศษส่วน อย่างต�่า What is form? 2 3 in its simplest

63 whole (n.) จ�านวนเต็ม Two halves make a whole or 1.

64 shaded (v.) ที่แรเงา What fraction of the collection is shaded?

65 fractions of collections (n.) เศษส่วนของกลุ่ม We find the given fraction of collections by dividing the collection into number of equal parts.

LENGTH MASS AND VOLUME

66 length (n.) ความยาว

67 breadth (n.) ความกว้าง The opposite sides of a rectangle are of the same length.

Find the perimeter of rectangle whose length and breadth are 12 cm and 9 cm.

68 metres (m) (n.) หน่วยเมตร The width of a room is 8

metres.

69 kilometers (km) (n.) หน่วยกิโลเมตร The distance between my house and school is 9 kilometres 580 metres.

70 centimetres (cm) (n.) หน่วยเซนติเมตร The area of a square is 100 square centimetres. 71 weight (n.) น�้าหนัก How much weight is it?

No. Vocabulary & Parts of speech Thai Definition Sentence

72 mass (n.) มวล, น�้าหนัก What is the mass of that object?

73 grams (g) (n.) หน่วยกรัม There are 100 grams in one kilogram. 74 lightest (adj.) เบาที่สุด What is the lightest object? 75 heaviest (adj.) หนักที่สุด Collect the things shown, which one is the heaviest?

76 container (n.) ภาชนะบรรจุ We should use standard containers such as litres, millilitres to measure capacity.

77 contain (v.) บรรจุ A fish tank contains 5000 millilitres of water.

78 kilograms (kg) (n.) หน่วยกิโลกรัม The mass of a boy would be measured in kilograms.

79 capacity (n.) ความจุ

80 liquids (n.) ของเหลว The amount a container can hold, measured in units of dry or liquid measure is called capacity.

We measure liquids such as milk, petrol, oil and water in litres and milliliters.

81 volume (n.) ปริมาตร Can the number of cubic units be measured in volume?

82 litres (l) (n.) หน่วยลิตร Litres and millilitres are standard units of capacity.

No. Vocabulary & Parts of speech Thai Definition Sentence

83 millilitres (ml) (n.) หน่วยมิลลิลิตร Liquid medicines in small bottles are measured in milliliters.

GEOMETRY

84 geometry (n.) เรขาคณิต Geometry is not easy to learn.

85 square (n.) รูปสี่เหลี่ยมจัตุรัส A square has 4 equal sides and 4 right angles. 86 rectangle (n.) รูปสี่เหลี่ยมผืนผ้า This cloth is rectangle. 87 triangle (n.) รูปสามเหลี่ยม Triangle has three sides and three angles.

88 circle (n.) รูปวงกลม A circle has one curved side and no has corners.

89 curve (n.) ส่วนโค้ง A sphere only has a curve surface.

90 vertice (n.) จุดยอดมุม The corner is also called a vertice.

91 angle (n.) มุม The angle has one vertex and two arms.

92 corner (n.) มุม In all figures the line segments meet at corners.

93 opposite sides (n.) ด้านตรงข้าม In a cuboid, the opposite sides of each face are equal.

94 solid (n.) ทรงตัน We know that solids can be of various shapes.

No. Vocabulary & Parts of speech Thai Definition Sentence

95 cube (n.) สี่เหลี่ยมลูกบาศก์ A cube has 6 faces, 12 edges and 8 corners.

96 cuboids (n.) รูปสี่เหลี่ยมด้านไม่ เท่ากัน In the cuboids, the opposite sides of each face are equal.

97 cylinder (n.) รูปทรงกระบอก A cylinder has 3 faces and 2 plane or flat faces and 1 curved face.

98 cone (n.) รูปทรงกรวย A cone has a plane surface and a curved surface.

99 sphere (n.) รูปทรงกลม A sphere has no edges or corners.

100 surface (n.) พื้นผิว A cylinder has two flat surfaces and one curved surface.

101 solid figure (n.) รูปทรงสามมิติ A figure has three dimensions: length, width, and height.

102 triangular prism (n.) รูปทรงสามเหลี่ยม Triangular prism has 5 faces, 9 edges and 6 corners.

103 scale (n.) ตราชั่ง You measure the things by using a scale.

104 curved surface (n.) พื้นผิวส่วนโค้ง An orange has curved surface.

105 plane face (n.) พื้นผิวแนวระนาบ A cube has 6 plane faces and every face is a square.

No. Vocabulary & Parts of speech Thai Definition Sentence

106 measure (v.) วัด

You can measure the length of the line segment by using a ruler. 107 edge (n.) ขอบ, ริม A cube has straight edges.

108 line (n.) เส้น

109 line segment (n.) ส่วนของเส้นตรง The thread represents a straight line.

A part of a line between two endpoints. The length of the line segment can be measured.

110 perpendicular lines (n.) เส้นตั้งฉาก Lines that meet or cross each other to form right angles are perpendicular lines.

111 parallel lines (n.) เส้นขนาน Lines that are the same distance apart are parallel lines.

112 intersecting lines (n.) เส้นตั้งฉาก Line AB cross line CD, they are intersecting line.

113 point (n.) จุด This is the highest point.

114 ray (n.) รังสี The ray AB begins at point A but it has no end.

115 right angle (n.) มุมฉาก(90o) Draw a 5-sided shape with 3

right angles.

116 acute angle (n.) มุมแหลม An angle with a measure greater than 0o and less than 90o is an acute angle.

No. Vocabulary & Parts of speech Thai Definition Sentence

117 straight angle (n.) มุมตรง A straight angle is an angle with a measure of 180o .

118 illustration (n.) แสดง, อธิบาย Trace the illustration shown here.

119 obtuse angle (n.) มุมป้าน Obtuse angle is the angle that more than 90o but less than 180o .

120 vertex (n.) จุดยอดมุม The point where two rays meet is called the vertex.

121 symmetry (n.) รูปสมมาตร How many axes of symmetry does a rectangle have?

AREA AND PERIMETER

122 axis of symmetry (n.) แกนสมมาตร

123 perimeter (n.) ความยามรอบรูป

124 area (n.) พื้นที่

125 measurement (n.) เครื่องมือวัด, หน่วยการวัด The line that divides the figure into two identical parts is called the axis of symmetry.

The sum of the length of all sides of a closed figure is called its perimeter.

The amount of surface a plane closed figure covers is called its area.

Kilograms and grams are the measurement of mass.

126 shape (n.) รูปร่าง Look at the objects and write down their shapes.

No. Vocabulary & Parts of speech Thai Definition Sentence

127 spaces (n.) ที่ว่าง

128 square centimetres (cm2) (n.) ตารางเซนติเมตร We can be used to measure the area of shapes if they do not leave spaces. A square centimeter is the area of a square of side 1 cetimetre and it has an area of 1 cm2 .

129 square metres (m2) (n.) ตารางเมตร A square meter is the area of a square of side 1 metre and it has an area of 1 m2 .