Mastering Mathematics 2B

WMPB12033B

Primary

Mastering Mathematics Workbook 2B

Special Features

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

Topic-By-Topic

10 9 8

11 12 1

7 6 5

2 3 4

Latest

MOE Syllabus

Primary WMPB12033B ISBN 978-981-07-1227-3

Pelangi Publishing Singapore Pte. Ltd.

( 201112597 C )

,!7IJ8B0-hbcchd!

Lilian Yeo mastering maths wb2B.indd 1

8/20/14 2:43 PM

Unit 10

Mental Calculations ............................................. 1

Unit 11

Money ............................................................ 4

General Revision 1 .......................................................... 11 Unit 12

Fractions .........................................................15

Unit 13

Time ............................................................. 29

General Revision 2.......................................................... 36 Unit 14

Volume .......................................................... 42

Unit 15

Graphs .......................................................... 50

General Revision 3 ......................................................... 55 Unit 16

Lines and Surfaces ............................................ 63

Unit 17

Shapes and Patterns .......................................... 69

General Revision 4 ......................................................... 78 Final Revision ............................................................... 84 Challenging Questions .................................................... 90 Answers .................................................................... 95 iv

Content 2B.indd 4

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Mathematics Primary 2B Unit 10 Mental Calculations

10

Mental Calculations

A Add mentally.

1. 79 + 6 =

2. 64 + 9 =

3. 87 + 8 =

4. 35 + 7 =

5. 382 + 4 =

6. 905 + 3 =

7. 346 + 9 =

8. 675 + 5 =

9. 148 + 20 =

10. 256 + 30 =

11. 928 + 50 =

12. 319 + 60 =

13. 457 + 40 =

14. 182 + 300 =

15. 335 + 400 =

16. 705 + 100 =

17. 574 + 200 =

18. 428 + 500 = 1

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Mathematics Primary 2B Unit 10 Mental Calculations

B Subtract mentally.

1. 34 – 6 =

2. 52 – 9 =

3. 25 – 7 =

4. 40 – 8 =

5. 348 – 9 =

6. 413 – 8 =

7. 693 – 5 =

8. 801 – 3 =

9. 635 – 40 =

10. 254 – 60 =

11. 726 – 30 =

12. 359 – 50 =

13. 492 – 90 =

14. 984 – 700 =

15. 647 – 400 =

16. 488 – 300 =

17. 393 – 100 =

18. 746 – 500 =

2

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Mathematics Primary 2B Unit 10 Mental Calculations

C Match the following.

1.

86 + 9 =

•

•

207

2.

53 – 6 =

•

•

236

3.

127 + 8 =

•

•

135

4.

245 – 9 =

•

•

95

5.

177 + 30 =

•

•

47

6.

526 – 50 =

•

•

54

7.

372 + 600 = •

•

840

8.

354 – 300 = •

•

990

9.

920 – 80 =

•

•

476

10.

997 – 7 =

•

•

972

3

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Mathematics Primary 2B Unit 11 Money

11

Money

A Write the correct amounts of money in numerals and in

words.

1.

20¢

20¢

20¢

10¢

5¢

¢ cents

2. $1

$1

10¢

5¢

50¢

$

5¢

dollars and

3.

cents $1

50¢

50¢

20¢

10¢

10¢

$1 5¢

5¢

4. $1

$1

5¢

5. $1

50¢

20¢

20¢

5¢

4

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Mathematics Primary 2B Unit 11 Money

B Write the correct amount of money needed to buy each of

these items.

1.

2.

50¢

$1

5¢

$1

10¢

10¢

A box of milk costs .

10¢

A storybook costs

3.

.

4.

$1 10¢

$1

10¢

5¢

5¢

A pair of shoes costs .

A bag costs

5.

.

6.

50¢ 50¢ 50¢

20¢

20¢

20¢ 10¢

5¢

5¢

5¢

5¢ 5¢

A teddy bear costs .

10¢

5¢

A bowl costs

.

5

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Mathematics Primary 2B Unit 11 Money

C Write each of the following amounts in cents.

1. $3.75 =

¢

2. $14.80 =

¢

3. $23.90 =

¢

4. $35.15 =

¢

5. $50.40 =

¢

6. $48.25 =

¢

7. $93.30 =

¢

8. $84.10 =

¢

10. $71.00 =

¢

9. $100.20 =

¢

D Write each of the following amounts in dollars.

1. 230¢ = $

3. 6800¢ = $

5. 205¢ = $ 7. 45¢ = $ 9. 1065¢ = $

2. 1155¢ = $

4. 7280¢ = $ 6. 4520¢ = $

8. 370¢ = $

10. 5¢ = $

6

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Mathematics Primary 2B Unit 11 Money

E Complete the following.

1. $4.30 =

dollars and

cents.

2. $11.50 =

dollars and

cents.

3. $23.40 =

dollars and

cents.

4. $65.55 =

dollars and

cents.

5. $12.75 =

dollars and

cents.

6. $92.35 =

dollars and

cents.

7. $36.05 =

dollars and

cents.

8. 82 dollars and 15 cents = $ 9. 19 dollars and 60 cents = $ 10. 90 dollars and 65 cents = $ 11.

fifty-cent coins make 1 dollar.

12. There are 10 13.

coins in $2.

ten-dollar notes make $50.

14. 5 twenty-cent coins and 4 fifty-cent coins make $

 .

15. 10 five-dollar notes and 5 ten-dollar notes make $

 .

7

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Mathematics Primary 2B Unit 11 Money

F Fill in the blanks.

1. Davin has $95.40 in his saving account. Benjamin has $94.50 in his saving account. (a) $ (b)

is less than $

 .

has less saving.

2. Uncle Thomas spent $73.85 on clothes. Uncle Steve spent $94.20 on clothes. (a) $ (b)

is more than $

 .

spent more on clothes.

3. Martha, Marissa and Tabitha went to a bookshop.

Martha spent $35.50.

Marissa spent $53.50.

Tabitha spent $35.05.

(a) $

is the smallest amount of money.

(b) $

is the greatest amount of money.

(c)

spent the most at the bookshop.

(d)

spent the least at the bookshop.

8

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Mathematics Primary 2B Unit 11 Money

G Find each of the following amounts.

1. 85¢ + 39¢ =

¢

2. 50¢ + 55¢ = $

3. $6 + $35 = $

4. $12 + $18 = $

5. 100¢ – 45¢ =

¢

6. 71¢ – 23¢ = $

7. $65 – $15 = $

8. $47 – $28 = $

H Solve the following word problems.

1. Darren’s father gave him $100 to pay for tuition fees. If the tuition fees is $75, how much change would he receive?

He would receive $

in change.

2. Aunt Emily spent $415 on presents. Aunt Sally spent $29 less than Aunt Emily. How much did both of them spend on presents altogether?

Both of them spent $

on presents altogether.

9

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Mathematics Primary 2B Unit 11 Money

3. Margerate wants to buy a dictionary for $48. She only has $43 with her. How much more money does she need?

She needs $

more.

4. Agnes receives $35 of pocket money every month from her  father. She spends $25 every month in school and saves the rest. How much money will Agnes save in 5 months?

Agnes will save $

in 5 months.

5. Sally had 45 hundred-cent coins. She put the money equally into 9 coin purses. How much money was there in each coin purse?

There was $

in each coin purse.

10

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A Fill in the blanks.

1. Subtract 27 from 503.

2. Add 323 and 500.

3. 100 more than 4.

is 799.

less than 636 is 436.

5. Find the sum of 90 and 287.

6. Find the difference between 900 and 535.

B Complete the following.

1. Write in numerals. (a) nineteen dollars and five cents. (b) thirty-four dollars and twenty-five cents.

11

11 Revision 1 2B.indd 11

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Mathematics Primary 2B General Revision 1

2. Express the following in cents. (a) $7.85 =

¢

(b) $100.05 =

¢

3. Express the following in dollars. (a) 525¢ = $ 4. $28.05 =

(b) 354¢ = $

dollars and

cents

5. 100 dollars and 15 cents = $ C Study the pictures below. Fill in each blank with the correct answer.

1.

$42.30

$12.35

$23.40

(a) The

costs the most.

(b) The

costs the least.

2.

COCA COLA

$1 $1

(a) A set of burger is $

Po Cr i

to ta sps

50¢ 50¢

50¢ 10¢

20¢ 5¢

10¢

5¢

more than a packet of chips.

12

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Mathematics Primary 2B General Revision 1

(b) A plate of noodles is $

less than a set of burger.

(c) Matthew has the amount of money shown as below. What are the items that he can buy if he spends all his money? $1

50¢

$1

20¢

Matthew can buy a

20¢ 5¢

and a

5¢

.

D Solve the following word problems.

1. Kristin has $148 in her piggy bank. She puts in another $53.

How much does she have now?

Kristin has

now.

2. A T-shirt costs $46 less than a dress. A dress costs $73. How much does the T-shirt cost?

The T-shirt costs $

.

13

11 Revision 1 2B.indd 13

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Mathematics Primary 2B General Revision 1

3. Terence and Steven each has 85¢. Each of them donates 50¢ to help the poor people. How much money do they have left in total?

They have

¢ left in total.

4. Jason bought 3 pencil cases. He gave the cashier a ten-dollar note and 5 one-dollar coins. What is the cost of a pencil case?

A pencil case costs $

.

5. Rosie saves $2 everyday. How much money could she save in 10 days?

She can save $

in 10 days.

14

11 Revision 1 2B.indd 14

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Mathematics Primary 2B Unit 12 Fractions

12

Fractions

A Circle the shapes that have been divided into equal parts.

B Write the fraction of the shape that is shaded.

1.

2.

15

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