Question

round 1: instead of finding the exact product, choose a number that is close to the product. which number is a reasonable estimate for $5 \times 79$? 4 40 400 4,000

Explanation:

Step1: Round 79 to nearest ten

$79 \approx 80$

Step2: Calculate product with rounded number

$5 \times 80 = 400$

Answer:

400