PS RU P4L37 Decimals (Thousandths _ Rounding to) WS

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Topic Decimals – Thousandths & Rounding to (Lesson 37)

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T_OPIC NAME

Primary 4: Rev Up! Math

Exercise 1: Fill in the blanks below with the correct answers.

a) In 342.021, the digit 1 is in the place.

b) In 410.316, the value of the digit 6 is .

c) In 13.432, the digit in the thousandths place is .

d) In 513.684, the digit in the thousandths place stands for .

Exercise 2: Express the following fractions as a decimal in the fruits.

(a) (b) (c) (d) (e)

3 14 1100 71 150421
1000 1000 1000 1000 1000

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Primary 4: Rev Up! Math

Exercise 3: Express the following decimals as fractions in their simplest
forms. Write your answers in the boxes.

a) b)
0.555 1.05

c) d)
21.125 100.4

Exercise 4: Fill in the missing fractions. Leave your answers in the simplest
form.

a) 2.701 = 2 + 7 + b) 14.121 = 14 + 1 +
10 10

c) 235.131 = 200 + 30 + d) 20.343 = 20 + 3 +
10

e) 107.324 = 100 + 130+ f) 582.407 = 80 + 7 +
1000

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Primary 4: Rev Up! Math

Exercise 5: Put a tick () in the box provided if the equation is correct.
Write the correct decimal in the cloud provided if the statement is
incorrect.

a) 4.001 = 4 + 0.01

b) 66.204 = 60 + 6 + 0.24

c) 321.941 = 300 + 20 + 1 + 0.9 + 0.041

d) 769.208 = 700 + 9 + 6.208

Exercise 6: Circle the decimal with the greatest value.

a) 1.911 9.119 19.19
9.191

b) 221.12 121.21 122.21
12.211

c) 430.6 340.6 430.06
34.06

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Primary 4: Rev Up! Math

Exercise 7: Write the correct decimal in each box.
1.

4.15 4.16 b)
2. a)

314.3 314.5 314.7
3. b)
a)

0.08 0.09 b)
*4 a)

15.3 15.4
a) b)

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Primary 4: Rev Up! Math

Exercise 8: Round the height of the following items:
(a) to the nearest whole number.

(b) to the nearest one decimal place.

1. 2. 3.

(a) 2.39 cm ≈ 41.45 cm ≈ 621.541 cm ≈
(b) 2.39 cm ≈ 41.45 cm ≈ 621.541 cm ≈

Exercise 9: Round the mass of the following items to the nearest 2 decimal
places.

1. 2.

7.141 kg ≈ 41.254 kg ≈
3. 4.

976.656 g ≈ 99.999 g ≈
5. 6.

1354.056 kg ≈ 69.905 kg ≈

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Primary 4: Rev Up! Math

Mini Test

Solve the following questions. place and its value is .
1) In 789.324, the digit 4 is in the
6
2) Express the following as a decimal.

a) 127 = b) 8152 =
1000 1000

c) 355010 =

3) Express the following as a fraction in its simplest form.

a) 0.122 = b) 1.275 =

4) Fill in the blanks.
a) 326.124 = 300 + 20 + 0.01 +

b) 732.149 = 700 + 30 + 2 + 1 +
10

5) Fill in the missing numbers.

Round the number to:

Number the nearest whole 1 decimal 2 decimal places
a) 0.915 number place

b) 1.572

c) 32.251

d) 452.899

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Primary 4: Rev Up! Math

Exercise 10: Solve the following questions.

a) I am thinking of a decimal with 1 decimal place. When the
decimal is rounded to the nearest whole number, the
answer is 4. What is the smallest possible value of the
decimal?

The decimal is .

b) I am thinking of a decimal with 2 decimal places. When the
decimal is rounded to the nearest whole number, the
answer is 6. What is the greatest possible value of the
decimal?

The decimal is .

c) The length of a rope is 18.9m when rounded to the nearest
1 decimal place. What is the greatest possible length of the
rope if the length is a decimal with 2 decimal places?

The decimal is .

d) The mass of a machine is 100.0kg when rounded to the nearest
1 decimal place. What is the smallest possible mass of the machine if the
mass of the machine is a decimal with 2 decimal places?

The decimal is .

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