Question

practice

1. round to the nearest whole number:

a. 6.723
b. 12.20
c. 8.5

1. round to the nearest tenth:

a. 3.4632
b. 9.9257
c. 7.15

1. estimate:

a. 19 \times 5
b. 198 \div 2
c. 502 + 97

1. why is estimation helpful when using a calculator?

Explanation:

Round to the nearest whole number

$$
LATEXBLOCK0
$$

Round to the nearest tenth

$$
LATEXBLOCK1
$$

Estimate the expressions

$$
LATEXBLOCK2
$$

Explain the utility of estimation with calculators

$$ \text{Estimation helps identify input errors, misplaced decimals, or incorrect operations on a calculator by providing a quick sanity check.} $$

Answer:

Question 1

a. 7
b. 12
c. 9

Question 2

a. 3.5
b. 9.9
c. 7.2

Question 3

a. 100
b. 100
c. 600

Question 4

Estimation provides a quick mental benchmark to verify if the calculator's output is reasonable, helping to catch keying errors or misplaced decimal points.