tessa needs to find 1.8 + 0.9. her answer is 1.17. is tessas answer reasonable? because using rounding to…

tessa needs to find 1.8 + 0.9. her answer is 1.17. is tessas answer reasonable? because using rounding to estimate shows that the sum should be close to the whole number

tessa needs to find 1.8 + 0.9. her answer is 1.17. is tessas answer reasonable? because using rounding to estimate shows that the sum should be close to the whole number

Answer

Explanation:

Step1: Round the numbers

Round 1.8 to 2 and 0.9 to 1.

Step2: Calculate the estimated sum

$2 + 1=3$.

Step3: Compare with Tessa's answer

Tessa's answer is 1.17 which is far from 3.

Answer:

No, 3