Page 7 - 新思维数学活动用书5 样章
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1 The number system
1.1 Understanding place value
Worked example 1
compose decompose
Find the missing numbers.
decimal hundredth
a 0.9 × = 9 decimal place place value
decimal point tenth
b 350 ÷ = 3.5
a 100s 10s 1s 10 s 100 s Use a place value grid to help you.
1
1
To move digits one column to the left
0 9 you multiply by 10.
9
0.9 × 10 = 9
b 1 1 To move digits two columns to the
100s 10s 1s 10 s 100 s right you divide by 100.
3 5 0
3 5 0
350 ÷ 100 = 3.5
6
