Mastering Mathematics 3A

WMPB13033A

Primary

Mastering Mathematics Workbook 3A

Mastering Mathematics is a comprehensive series of assessment workbooks which is written based on the latest Primary Mathematics Syllabus issued by the Ministry of Education of Singapore. Each of the workbooks provides sufficient practices on various types of questions. The approach adopted by the writer aims at reinforcing mastery of mathematical concepts, improving problem-solving skills and developing creative and critical thinking skills.

Special Features

3 Topical-based practices 3 5 sets of revision papers 3 Challenging questions 3 Complete answers

Topic-By-Topic

Latest

MOE Syllabus

Primary WMPB13033A ISBN 978-981-07-1228-0

Pelangi Publishing Singapore Pte. Ltd.

( 201112597 C )

,!7IJ8B0-hbccia!

Lilian Yeo mastering maths wb3A.indd 1

8/20/14 2:44 PM

Unit 1

Numbers Up to 10 000........................................ 1

Unit 2

Addition of Numbers within 10 000.......................... 9

General Revision 1......................................................... 16 Unit 3

Subtraction of Numbers within 10 000 ................... 20

Unit 4

Using Models : Addition and Subtraction ............... 26

General Revision 2 ........................................................ 30 Unit 5

Multiplication Tables of 6, 7, 8 and 9 ................... 35

Unit 6

Multiplication.................................................. 44

General Revision 3 ........................................................ 50 Unit 7

Division......................................................... 57

Unit 8

Using Models : Multiplication and Division .............. 62

Unit 9

Mental Calculations ......................................... 69

General Revision 4 ......................................................... 71 Final Revision .............................................................. 75 Challenging Questions ................................................... 80 Answers .................................................................. 83 iv

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Mathematics Primary 3A Unit 1 Numbers Up to 10 000

1

Numbers Up to 10 000

A Write in numerals.

1. four thousand six hundred and thirty-four 2. two thousand three hundred and twenty 3. seven thousand and eighty-one 4. nine thousand nine hundred and one 5. five thousand one hundred and ten 6. three thousand five hundred and nineteen B Write in words.

1. 2260 2. 4929 3. 7613 4. 9001 5. 8841 6. 5305 1

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Mathematics Primary 3A Unit 1 Numbers Up to 10 000

C Count and write out the numerals and number words.

1.

In numerals:

In words:

2.

In numerals:

In words:

3.

In numerals:

In words:

4.

In numerals:

In words:

2

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Mathematics Primary 3A Unit 1 Numbers Up to 10 000

D Count on the numbers by tens, hundreds or thousands.

1. 5270, 5280,

,

2. 4312,

, 6312,

3. 6054,

,

4. 7364,

, 7384,

5. 5602,

,

6. 1943, 2943,

, 5310, ,

, 9312

, 6354,

, 6554

,

, 7414

, 5902,

, 6102

,

, 5943,

E Fill in the blanks.

1. 4505 =

thousands

hundreds

ten

ones

2. 3769 =

thousands

hundreds

tens

ones

3. 5843 =

thousands

hundreds

tens

ones

4. 1035 =

thousand

hundred

tens

ones

5. 2260 =

thousands

hundreds

tens

one

3

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Mathematics Primary 3A Unit 1 Numbers Up to 10 000

F Find the missing numbers.

1. 7431 =

+ 400 + 30 + 1

2. 9864 = 9000 +

+ 60 + 4

3. 2759 =

+ 700 +

+9

4. 3810 =

+

+

+

5. 7325 =

+

+

+

6. 8431 =

+

+

+

7. 4090 =

+

+

+

8. 7000 + 600 + 10 + 2 = 9. 4000 + 300 + 70 = 10. 8 + 20 + 5000 = 11. 8000 + 500 + 1 = 12. 1000 + 9 = G Complete the following table.

Number 1.

1097

2.

5354

3.

3098

4.

2048

5.

5474

6.

9384

7.

6920

8.

7825

Place value

Digit value

4

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Mathematics Primary 3A Unit 1 Numbers Up to 10 000

H Find the place value or value of each digit in the following

numbers.

1. In 4250, (a) the digit 0 is in the (b) the digit 4 is in the

place. place.

(c) the value of the digit 5 is

.

(d) the value of the digit 2 is

.

2. In 6705, (a) the digit 0 is in the (b) the value of the digit 6 is

place. .

I Circle the smaller number.

1. 7884 , 6884

2. 4967 , 4697

3. 4054 , 4000

4. 6134 , 6143

5. 2442 , 2424

6. 3587 , 3758

7. 8723 , 8721

8. 9209 , 9920

J Circle the greater number.

1. 3645 , 4653

2. 7020 , 7200

3. 3115 , 1315

4. 5483 , 5438

5. 2602 , 2502

6. 4787 , 4877

7. 8006 , 8060

8. 9304 , 9340

5

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Mathematics Primary 3A Unit 1 Numbers Up to 10 000

K Fill in the blanks with ‘smaller’ or ‘greater’.

1. 1253 is

than 2153.

2. 7312 is

than 7123.

3. 6002 is

than 6200.

4. 1301 is

than 1031.

5. 9610 is

than 9710.

L Complete the number patterns.

1. 5690, 2.

, ,

, 5720,

, 5740

, 3409, 3410, 3411

3. 2310,

, 2312,

, 2314

4. 7700,

, 7900,

, 8100

5. 4000,

,

, 7000, 8000

6

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Mathematics Primary 3A Unit 1 Numbers Up to 10 000

M Arrange these numbers in order, beginning with the greatest.

1.

2.

2825

9450

3925

3025

,

9650

8520

2625

,

9550

8500

3225

,

9850

2425

, 3825

, 4607

,

,

, 4670

,

,

, 4076

,

,

4.

,

3.

9750

4025

, 4706

4677

,

N Arrange these numbers in order, beginning with the smallest.

8613

3861

,

,

2.

4540

5440

,

,

3.

7632

5134

,

,

4.

6020

5370

,

,

1.

6813 , 4450 , 7845 , 5037 ,

8316

1863

, 4504

5404

, 6812

6527

, 6002

5703

, 7

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Mathematics Primary 3A Unit 1 Numbers Up to 10 000

O Answer the following questions.

2

1

4

3

7

10

5

6

8

9

11

12

1. Write down all the odd numbers.

2. Write down all the even numbers.

200

15

27

36

49

80

143

122

3. Write down all the odd numbers.

4. Write down all the even numbers.

P Fill in the blanks.

1. Use all the digits 0, 3, 4 and 5 to form the smallest 4-digit odd number.

2. Use all the digits 2, 7, 1 and 8 to form the smallest 4-digit even number.

3. Use all the digits 0, 6, 5 and 9 to form the greatest 4-digit odd number.

4. Use all the digits 3, 2, 8 and 4 to form the greatest 4-digit even number.

8

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Mathematics Primary 3A Unit 2 Addition of Numbers within 10 000

Addition of Numbers within 10 000

2

A Find the sum of these numbers.

1. 8310 and 547 =

2. 2234 and 415 =

3. 3074 and 6213 =

4. 6253 and 1745 =

5. 5134 and 2561 =

6. 4600 and 4500 =

7. 3800 and 2800 =

8. 7500 and 1500 =

B Add. 1.

3 1 2 5 + 4 3 5 4

2.

7 3 2 4 + 5 3 1

3.

2 0 3 5 + 4 6 3

4.

6 4 0 0 + 1 8 0 0

5.

5 8 0 0 + 2 1 0 0

6.

4 5 0 0 + 4 5 0 0

9

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Mathematics Primary 3A Unit 2 Addition of Numbers within 10 000

C Fill in the blanks.

1. 2 hundreds 3 tens + 4 hundreds 5 tens

=

hundreds

tens

2. 4 hundreds 6 tens + 3 hundreds 8 tens

=

hundreds

tens

=

hundreds

tens

3. 8 hundreds 5 tens 4 ones + 3 hundreds 4 tens 9 ones

=

hundreds

tens

=

thousand

hundreds

ones ten

ones

4. 9 hundreds 5 tens 8 ones + 8 hundreds 9 tens 5 ones

=

hundreds

tens

=

thousand

hundreds

ones tens

ones

5. 5 thousands 3 hundreds 5 tens 7 ones + 3 thousands 8 hundreds 7 tens 2 ones

=

thousands

hundreds

tens

ones

=

thousands

hundreds

tens

ones

6. 2 thousands 6 hundreds 4 tens 6 ones + 5 thousands 3 hundreds 9 tens 9 ones

=

thousands

hundreds

=

thousands

hundred

tens tens

ones ones

10

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Mathematics Primary 3A Unit 2 Addition of Numbers within 10 000

D Find the sum of these numbers.

1. The sum of 3645 and 1237 is

.

2. The sum of 4267 and 5472 is

.

3. The sum of 2513 and 4799 is

.

4. The sum of 1497 and 938 is

.

E Add. 1.

2 7 4 1 + 2 0 7 8

2.

4 9 6 7 + 1 6 3 2

3.

3 4 0 5 + 5 6 2 7

4.

5 9 9 5 + 1 6 7 8

5.

1 9 1 6 + 3 0 8 8

6.

1 0 9 3 + 6 9 0 7

11

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Mathematics Primary 3A Unit 2 Addition of Numbers within 10 000

F Find the missing numbers.

1.

3.

5.

7.

5

+

4

0

4

5

9

9

9

3

0

7

4

2

3

+

+

2

5

6

9

7

6

8

4

5

+

2

6

9

5

2

4

4

1

2

6

9

7

6

7

1

0

2

3

8

5

0

7

9

2

9

+

9.

2.

9

4

1

+

5

9

3

4.

6.

8.

10.

1

+

4

7

7

8

8

9

3

6

5

6

3

4

1

4

9

9

7

3

4

9

2

2

6

9

3

5

7 2

+

2

5

5

1

8

2

6

8

5

+

4

3

6

7

0

5

0

5

8

8

9

+

2

4

8

3

6 6

5

12

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Mathematics Primary 3A Unit 2 Addition of Numbers within 10 000

G Match.

1. 2105 + 3872

6103

1254 + 4723

2. 3146 + 2957

7394

2419 + 3684

3. 7413 + 1697

5977

4367 + 2456

4. 5038 + 2356

6823

3347 + 4047

5. 4039 + 2784

9110

5455 + 3655

13

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Mathematics Primary 3A Unit 2 Addition of Numbers within 10 000

H Solve the following word problems.

1. Claire collected 2484 bonus points from a game. Lucy collected 6353 bonus points from the same game. How many bonus points did both of them collect in total?

2. Sunshine Ltd. built 2438 terrace houses, 249 semi-detached houses and 54 bungalows. How many houses did Sunshine Ltd. build?

3. John saved $1292 in May, $537 in June and $1728 in July. How much money did John save in these three months?

14

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Mathematics Primary 3A Unit 2 Addition of Numbers within 10 000

4. Bookshop K sold 3428 books in September and 1583 more books in October. How many books did Bookshop K sell altogether in these two months?

5. The canteen earned $3926 and $1697 from selling food and drinks last month. How much did the canteen earn in total last month?

6. Uncle Rain had 1375 eggs left after selling 3625 eggs. How many eggs did he have at first?

15

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