Money
2 How much more does the radio player cost than the tennis racquet? Estimate first. 215.50 200 78.30 80 200 − 80
The difference is approximately $120. Use a written method to subtract decimals.
0
1
2 1 5 5 0
7 8 3 0 1 3 7 2 0
−
The difference is $137.20
Let’s Practise 1 (a) Estimate the answer to 234.78 − 17.45. (b) Riana uses a written method to calculate the answer:
1
1
2 3 4 7 8
− 1 7 4 5
6 0 2 8
Explain the error that Riana has made.
195
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01/12/2021 14:49
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