Page 33 - Touchpad Mathematics_Ver1.0_C4

Tips

We can round a number to the nearest 10 by looking at its ones digit.
If the ones digit of a number is less than 5, round the number to the smaller tens.

Examples: 21, 22, 23 and 24 round to 20 as their ones digits are less than 5.
If the ones digit of a number is 5 or more than 5, round the number to the bigger
tens.

Examples: 25, 26, 27, 28 and 29 round to 30 as their ones digits are 5 or more
than 5.

Exercise 1G

1. Use the nearest tens to fill in the blanks.

a. 64 lies between ____ and ____ b. 69 lies between ____ and ____

c. 75 lies between ____ and ____ d. 89 lies between ____ and ____

2. Write the tens for the given numbers:

a. 73 b. 29 c. 38

d. 48 e. 56 f. 85

3. round off the following numbers to the nearest 10.
a. 65 _____ b. 89 _____ c. 81 _____ d. 25 _____

e. 27 _____ f. 52 _____ g. 73 _____ h. 44 _____

i. 36 _____ j. 18 _____ k. 94 _____ l. 33 _____

4. Solve the following:

a. There are 26 pens in a box. Round the number of pens to the nearest 10.

b. A shopkeeper sold 74 magazines in a week. How many magazines did the
shopkeeper sell to the nearest 10?
c. There are 59 passengers in a bus. Round the number of passengers to the nearest
10.

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Numbers