Workbook Prathomsuksa 4 © Pelangi Publishing (Thailand) Co., Ltd. 2022 All rights reserved. No part of this publication may be reproduced, stored in any retrieval system or transmitted in any form or by any means without permission of Pelangi Publishing (Thailand) Co., Ltd. 2022
BJRC364031_GoGetMaths WB Prelimpage P4.indd 1
885-87220-0362-3 First Published 2022
19/1/2565 BE 09:25
Contents Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6
Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11
Content SG Maths WB P4 page ii.indd 2
Numbers
1
Practices Think
1 13
Addition and subtraction
14
Practices Think
14 28
Multiplication and division
29
Practices Think
29 51
Mixed operations
52
Practices Think
52 63
Fractions
64
Practices Think
64 86
Time
87
Practices Think
87 103
Revision 1
104
Decimals
112
Practices Think
112 130
Addition and subtraction of decimals
131
Practices Think
131 149
Geometry
150
Practices Think
150 162
Squares and rectangles
163
Practices Think
163 188
Two-way tables and bar charts
189
Practices Think
189 199
Revision 2
200
04/12/2021 6:35 PM
Chapter 1 Numbers Practice 1
Counting beyond 100,000
1. Count. Write in Hindu-Arabic numerals and Thai numerals. .g .
100,000
10,000
10,000
1,000
100
10
1
100,000
10,000
10,000
1,000
100
10
1
100,000
10,000
10,000
100
10
1
100,000
10,000
100
1
10,000
1
๔๘๒,๔๓๕
482,435 a
100,000
100,000
10,000
1,000
1,000
100
100,000
10,000
1,000
1,000
100
1
100,000
10,000
1,000
100
1
100,000
1,000
100
1
100,000
1,000
1
๖๓๗,๔๑๔
637,414 b
10
1,000,000
100,000
10,000
1,000
100
100
10
1
1,000,000
100,000
10,000
1,000
100
100
10
1
1,000,000
100,000
10,000
1,000
100
100
100,000
10,000
1,000
100
100
10,000
3,454,923
1
100
๓,๔๕๔,๙๒๓ Chapter 1 | 1
SG Maths WB P4 Unit 01-04 not ans.indd 1
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2. Write in numerals. .g.
Six hundred and fifty thousand four hundred and seventeen
650,417
a Three hundred seventy-four thousand six hundred and twenty-five
374,625
b Eight hundred and sixty-one thousand two hundred and seventy-eight
861,278
c One million eight hundred and three thousand one hundred and ninety-nine
1,803,199
d Thirty-four million twenty-one thousand one hundred and six
34,021,106
e Seventy-five million three hundred and forty-seven thousand two hundred and twenty-one
75,347,221
3. Write in words. .g .
a
b
ac
d
e
174,687
One hundred and seventy-four thousand six hundred and eightyseven
207,634
Two hundred and seven thousand six hundred and thirty-four
531,158
Five hundred and thirty-one thousand one hundred and fifty-eight
3,578,009
Three million five hundred and seventy-eight thousand and nine
7,674,547
Seven million six hundred and seventy-four thousand five hundred and forty-seven
20,368,975
Twenty million three hundred and sixty-eight thousand nine hundred and seventy-five
2 | Mathematics Prathomsuksa 4
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4. Fill in the blanks. .g .
a
b
c
d
124,684 =
673,874 =
457,341 =
1
hundred thousand 2
ten thousands 4
6
hundreds 8
ones
6
hundred thousands 7
ten thousands 3
8
hundreds 7
ones
4
hundred thousands 5
ten thousands 7
3
hundreds 4
one
tens 4
tens 4
tens 1
thousands
thousands
3
millions 8
4
thousands 2
hundreds 7
tens 5
24,916,287 = 2
ten millions
4
millions
9
hundred thousands
1
ten thousand
6
thousands
2
hundreds
7
ones
3,834,275 =
hundred thousands 3
thousands
ten thousands ones
8
tens
5. Fill in the blanks. .g .
34,741 =
30,000
+ 4,000 + 700 + 40 + 1
a 64,297 = 60,000 + 4,000 +
200
+ 90 + 7
b 600,000 + 50,000 + 4,000 + 700 + 80 + 3 = c
241,726 = 200,000 + 40,000 + 1,000 + 700 +
d 3,000,000 + 400,000 + e
50,000
654,783 20
+6
+ 7,000 + 600 + 70 + 2 = 3,457,672
54,386,418 = 50,000,000 + 4,000,000 + 300,000 + 80,000 + 6,000 + 400 +
10 + 8 Chapter 1 | 3
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6. Fill in the blanks based on the number below. 12,486,379 .g .
The digit
1
is in the ten millions place. Its value is
a The digit
2
is in the millions place. Its value is
b The digit
4
is in the hundred thousands place. Its value is
c
The digit
8
is in the ten thousands place. Its value is
d The digit
6
is in the thousands place. Its value is
6,000
e
The digit
3
is in the hundreds place. Its value is
300
f
The digit
7
is in the tens place. Its value is
70
.
g The digit
9
is in the ones place. Its value is
9
.
10,000,000 .
2,000,000 . 400,000
.
.
80,000 . .
7. Fill in the blanks based on the number below. 67,145,892 .g .
The digit 4 is in the
ten thousands
a The value of digit 8 is b The digit c
7
6
.
is in the millions place.
The value of digit
d The digit
800
place.
9
is 90.
is in the ten millions place.
e
The digit 1 is in the
f
The value of digit 5 is
hundred thousands 5,000
place.
.
4 | Mathematics Prathomsuksa 4
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Practice 2
Comparing and ordering numbers
1. Fill in the blanks. Compare. .g .
HTh
TTh
Th
H
T
O
374,124
3
7
4
1
2
4
610,714
6
1
0
7
1
4
3
6
hundred thousands is smaller than
374,124 a
is smaller than
hundred thousands.
.
610,714
HTh
TTh
Th
H
T
O
721,675
7
2
1
6
7
5
721,879
7
2
1
8
7
9
6
8
hundreds is smaller than
721,675 b
is smaller than
hundreds.
721,879
.
M
HTh
TTh
Th
H
T
O
4,340,247
4
3
4
0
2
4
7
4,340,248
4
3
4
0
2
4
8
7
ones.
8
ones is greater than
4,340,248
is greater than
4,340,247 .
Chapter 1 | 5
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2. Shade the greater number. .g .
b
d
437,248
473,457
567,257
568,257
3,607,455
3,607,454
a
c
e
167,541
167,451
347,674
307,417
18,340,687
18,430,876
14,014,745
31,240,141
274,854
274,584
64,745,327
64,745,727
3. Shade the smaller number. .g .
b
d
5,320,120
5,324,120
654,831
655,860
57,147,368
57,147,380
a
c
e
4. Fill in the blanks with < or >. 87,741
>
87,714
a 12,474
>
2,474
b 340,147
<
347,879
c
67,745
<
67,787
e
25,784,340
.g .
d 7,416,897
<
8,748,778
>
25,748,340
6 | Mathematics Prathomsuksa 4
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5. Mark these numbers on the number line. Then, arrange the numbers. .g .
111,200
113,800 111,200
110,600 110,000
112,500 111,900
111,000
110,600
111,900
112,500
112,000
113,800 113,000
114,000
Starting with the smallest number: 110,600,
111,200, 111,900,
112,500,
425,780
425,630
425,820
a
425,600
113,800
425,720
425,700
425,690
425,800
Starting with the smallest number: 425,630,
b
721,000
425,690,
425,720,
721,600
720,000
425,780,
425,820
720,700
719,700
721,000
720,300
722,000
Starting with the greatest number: 721,600,
721,000,
720,700,
720,300,
719,700
Chapter 1 | 7
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