Calculating with fractions and decimals
2 Let’s subtract decimal numbers using the column method. Find 7.43 − 1.06.
First, subtract the hundredths. We cannot subtract 6 hundredths from 3 hundredths, so we must regroup 1 tenth into 10 hundredths. Now we have 13 hundredths. 13 hundredths – 6 hundredths = 7 hundredths
Step 1
7
3 4
13 3
− 1
0 6 7
Next, subtract the tenths. Now we have 3 tenths.
Step 2
7
3 4
13 3
− 1
0 6 3 7
Finally, subtract the ones. 7 ones − 1 one = 6 ones
Step 3
7
3 4
13 3
− 1
0 6
6
3 7
So, 7.43 − 1.06 = 6.37.
Use a written method to calculate (a) 4.21 + 3.48 (b) 2.82 + 0.67
1
(c) 5.71 + 7.47
173
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28/04/2022 12:13
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