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Diano4ka-milaya [45]
3 years ago
10

Explain how an estimate helps you place the decimal point when multiplying 3.9 × 5.3

Mathematics
2 answers:
natali 33 [55]3 years ago
4 0
An estimate helps you because you round 3.9 to 4 and 5.3 to 5 so then you can give a rough estimation
den301095 [7]3 years ago
4 0

Answer:

3.9\times 5.3\approx 20

Step-by-step explanation:

To find : How an estimate helps you place the decimal point when multiplying 3.9\times 5.3 ?

Solution :

Estimate the number 3.9 by rounding to ones,

As tenth place 9 >5 ones place round by 1.

So, 3.9\approx 4

Estimate the number 5.3 by rounding to ones,

As tenth place 3<5 ones place remain same.

So, 5.3\approx 5

3.9\times 5.3\approx 4\times 5

3.9\times 5.3\approx 20

Therefore, 3.9\times 5.3\approx 20

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