Mastering Mathematics 2A

WMPB12033A

Primary

Mastering Mathematics Workbook 2A

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 WMPB12033A ISBN 978-981-07-1226-6

Pelangi Publishing Singapore Pte. Ltd.

( 201112597 C )

,!7IJ8B0-hbccgg!

Lilian Yeo mastering maths wb2A.indd 1

8/20/14 2:42 PM

Unit 1

Numbers Up to 1000............................................. 1

Unit 2

Addition and Subtraction within 1000......................... 4

General Revision 1 ..........................................................10 Unit 3

Using Models: Addition and Subtraction.....................16

Unit 4

Multiplication and Division......................................19

General Revision 2.......................................................... 26 Unit 5

Multiplication and Division: Tables of 2 and 3............. 32

Unit 6

Multiplication and Division: Tables of 4, 5 and 10......... 40

Unit 7

Using Models: Multiplication and Division ................. 46

General Revision 3 ......................................................... 49 Unit 8

Length ............................................................ 53

Unit 9

Mass ............................................................. 65

General Revision 4 ......................................................... 77 Final Revision ............................................................... 85 Challenging Questions .................................................... 93 Answers ..................................................................... 97 iv

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Mathematics Primary 2A Unit 1 Numbers Up to 1000

1

Numbers Up to 1000

A Count and write the numbers in numerals and words.

1.

In numerals

__________ hundred and __________ 2.

3.

1

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Mathematics Primary 2A Unit 1 Numbers Up to 1000

B Write the correct digit in the respective place value.

Numerals 1.

506

2.

764

3.

820

4.

917

5.

631

Hundreds

Tens

Ones

C State the place value of the underlined digit.

1.

347

2.

81 2

3.

249

4.

754

5.

692

6.

492

D Colour the greatest number and cross out the smallest

number.

1.

443

,

334

,

434

,

343

2.

616

,

661

,

166

,

611

3.

519

,

159

,

915

,

591

4.

870

,

708

,

807

,

780

2

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Mathematics Primary 2A Unit 1 Numbers Up to 1000

E Fill in each blank with the correct answer.

1. 10 less than 970 is

.

2. 30 more than 540 is

.

3. 10 more than

is 345.

4. 50 less than

is 780.

5.

more than 669 is 699.

6.

less than 680 is 608.

7. 454 is

than 545.

8. 988 is

than 898.

F Complete the number patterns.

1. 350 , 2.

, 370 , 380 , , 900 , 850 ,

3. 600 , 4.

5. 950 , 750 ,

, 750

, ,

, 690 , 720 , 430, 330, 230 , 350 , 3

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Mathematics Primary 2A Unit 2 Addition and Subtraction within 1000

Addition and Subtraction within 1000

2

A Do these additions without regrouping.

1. 154 + 235 =

H

T

2. 563 + 314 = O

1 5 4 + 2 3 5

3. 340 + 428 =

H

T

O

3 4 0 + 4 2 8

H

T

O

4 2 1 + 4 7 3

H

T

O

5 6 3 + 3 1 4

H

T

O

8 4 6 + 1 3 2

6. 304 + 253 =

7. 372 + 226 =

T

4. 846 + 132 =

5. 421 + 473 =

H

H

T

O

3 0 4 + 2 5 3

8. 266 + 632 = O

3 7 2 + 2 2 6

H

T

O

2 6 6 + 6 3 2

4

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Mathematics Primary 2A Unit 2 Addition and Subtraction within 1000

B Do these subtractions without regrouping.

1. 345 – 132 =

2. 673 – 251 =

H

O

H

3 4 5 1 3 2

6 7 3 2 5 1

–

T

3. 815 – 302 =

–

T

O

4. 784 – 153 =

H

O

H

8 1 5 3 0 2

7 8 4 1 5 3

–

T

5. 968 – 214 =

–

T

O

6. 589 – 213 =

H

O

H

9 6 8 2 1 4

5 8 9 2 1 3

–

T

–

T

O

C Add these numbers with regrouping.

1. 246 + 119 =

H

2. 342 + 258 = T

O

2 4 6 + 1 1 9

5

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Mathematics Primary 2A Unit 2 Addition and Subtraction within 1000

3. 513 + 218 =

4. 275 + 318 =

5. 685 + 275 =

6. 453 + 389 =

D Subtract these numbers with regrouping.

1. 423 – 154 =

2. 851 – 369 =

H

4 2 3 1 5 4

–

T

O

3. 700 – 358 =

4. 950 – 387 =

5. 347 – 139 =

6. 636 – 457 =

6

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Mathematics Primary 2A Unit 2 Addition and Subtraction within 1000

E Match.

1.

275 + 143

• 638 •

576 – 173

2.

340 + 298

• 403 •

637 – 219

3.

116 + 287

• 418 •

853 – 265

4.

289 + 299

• 588 •

812 – 174

F Solve the following word problems.

1. Ken sold 216 Christmas concert tickets. John sold 321 ­Christmas concert tickets. How many Christmas concert tickets did both of them sell altogether?

Both of them sold altogether.

Christmas concert tickets

7

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Mathematics Primary 2A Unit 2 Addition and Subtraction within 1000

2. Roy collected 548 copies of old newspapers and Tommy collected 445 more copies of old newspapers than Roy. How many copies of old newspapers did Tommy collect?

Tommy collected

copies of old newspapers.

3. 899 pupils went to Universal Stadium on Sunday. 475 of them are girls. How many boys are there?

There are

boys.

4. Grace and Dennis picked up 348 seashells and stones at Summer Beach. 115 of them were seashells. How many stones did they pick up?

They picked up

stones.

8

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Mathematics Primary 2A Unit 2 Addition and Subtraction within 1000

5. Mr Bernard sold 164 strawberry ice creams and 126 chocolate ice creams at a funfair. How many ice creams did Mr Bernard sell altogether?

Mr Bernard sold

ice creams altogether.

6. There are 880 seats in a train. 535 seats are occupied. The rest are not occupied. How many seats are not occupied?

seats are not occupied.

7. The Primary 2 pupils had to bake 500 cookies for some orphans.

They baked 174 cookies on Saturday and 215 cookies on Sunday.

How many more cookies must they bake?

They must bake

more cookies.

9

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A Write the following numbers in words.

1. 591 2. 357 3. 428 B Write the following in numerals.

1. Eight hundred and seventy-two 2. Five hundred and two 3. Six hundred and thirty-nine C State the place value of the underlined digit.

1. 591

2. 639

3. 146

4. 459

5. 840

6. 903

10

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Mathematics Primary 2A General Revision 1

D Fill in each blank with ‘more’ or ‘less’.

1. 608 is

than 680.

2. 332 is

than 323.

3. 454 is

than 545.

4. 199 is

than 119.

5. 683 is

than 688.

6. 709 is

than 907.

E Fill in the correct answers.

1. 1 less than 799 is

.

2. 20 more than 628 is

.

3. 100 less than 800 is

.

4. 300 more than 300 is

.

F Arrange the numbers in order, beginning with the smallest.

1.

435

620

413

571

673

736

637

613

631

2.

517

11

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Mathematics Primary 2A General Revision 1

G Arrange the numbers in order, beginning with the greatest.

1.

633

701

311

414

256

400

396

241

902

278

141

2.

152

H Fill in the blanks.

1.

,

2. 220 ,

, 403 , 503 , , 216 ,

,

3.

,

, 813 ,

4.

,

, 715 , 710 ,

, 210 , 815

12

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Mathematics Primary 2A General Revision 1

I Solve these sums.

1.

5 3 7 + 2 9 0

2.

4 5 3 + 2 4 9

3.

5 4 0 1 3 5

4.

9 1 3 4 5 7

5.

3 5 6 + 1 5 8

6.

2 7 9 + 6 5 7

7.

8 5 6 4 6 9

8.

9 3 4 2 3 9

–

–

–

–

J Fill in the blanks.

1.

3

3

3

+

2.

6

0

5

8

5

5

+ 5

4

0

13

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Mathematics Primary 2A General Revision 1

3.

3 +

1

2

5.

4

5

8

1

3

5

0

0

6.

2

6

4 3

8

0

8

9

2

1

–

7

7 2

1

3 +

3

–

–

4.

9

9

7.

3

6

8

5

–

2

5

4

6

0

5

8.

K Solve the following word problems.

1. A factory produced 456 loaves of bread. If 247 of them were sold, how many loaves of bread were left in the factory?

loaves of bread were left in the factory.

14

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Mathematics Primary 2A General Revision 1

2. 658 people visited the library in January. 350 fewer people visited the library in February than in January. How many people visited the library altogether in these two months?

people visited the library altogether in these two months.

3. The table below shows the number of people who visited the Science Exhibition on Sunday.

Number of Visitors Men

209

Women

234

Children

351

(a) How many people visited the Science Exhibition altogether?

people visited the Science Exhibition.

(b) How many fewer men than women were there at the exhibition?

There were

fewer men than women.

(c) How many more children than women were there at the exhibition?

There were

more children than women.

15

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