Page 14 - 新思维数学活动用书5 样章

1.2 Rounding decimal numbers

6 Here are three number cards.

9 1 5

Use each card once to make a number that rounds to 20 to the nearest whole

number.

7 A number with 1 decimal place is rounded to the nearest whole number.

a What is the smallest number that rounds to 100?

b What is the largest number that rounds to 100?

Challenge

8 Write the letters of all the numbers that round to 10 to the nearest whole number.

What word is spelt out?

A B C D E F G H I J K L M

10.8 10.1 9.3 11.1 10.4 7.8 8.8 9.3 19.8 1.9 10.7 9.6 99.9

N O P Q R S T U V W X Y Z

1.8 9.2 10.6 9.1 10.5 7.9 9.5 19.9 16.2 10.9 20.3 8.9 9.4

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