Task 1
1 How do you subtract decimals without regrouping?
2 Explain the importance of aligning the decimal points in subtracting decimals?
3 How do you estimate the difference of decimals with reasonable results?
1 How do you subtract decimals without regrouping?
2 Explain the importance of aligning the decimal points in subtracting decimals?
3 How do you estimate the difference of decimals with reasonable results?
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Answer:
1. 26 . 69
- 10 . 43
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6 . 26
Six tenths minus four tenths equals two tenths remember to write the decimal point. Now subtract the ones one 1-0 ones equals one one.
2. In order to keep the numbers in the proper place-value column when adding decimals, align the decimal points. This will keep the numbers aligned; ones to ones, tenths to tenths, hundredths to hundredths, and so on.
3. The easiest way to estimate a sum or a difference of decimals is to round the decimal. If you round the decimal to the nearest whole number, you can complete the problem using mental math or at least simplify the problem so that finding an answer is easier.
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