Question

33 × 44 is about 1,200. which number is a reasonable estimate for 18 × 523? 50,000 10,000 1,000 500

Explanation:

Step1: Round numbers to tens/hundreds

Round $18 \approx 20$, $523 \approx 500$

Step2: Calculate estimated product

$\text{Estimate} = 20 \times 500 = 10,000$

Answer:

10,000