Question

estimate, and then find the quotient. use your estimate to check for reasonableness
424 ÷ 3

choose the best estimate for the quotient
□ ÷ 3 ≈ □ (type a whole number.)

430
420
410

Explanation:

Step1: Pick compatible estimate number

Choose 420 (divisible by 3)

Step2: Calculate estimated quotient

$\frac{420}{3}=140$

Step3: Calculate actual quotient

$\frac{424}{3}=141\frac{1}{3}$

Step4: Check reasonableness

$141\frac{1}{3}$ is close to 140, so estimate is reasonable.

Answer:

Best estimate: 420, Estimated quotient: 140, Actual quotient: $141\frac{1}{3}$