Question

1. for which of the following expressions would 200,000 be a reasonable estimate? explain how you 2,146×12 21,467×121 2,146×121 21,477×1,217

Explanation:

Step1: Round the numbers for estimation

Round 2,146 to 2,000 and 12 to 10, then \(2,000\times10 = 20,000\).

Step2: Round 21,467 to 20,000 and 121 to 100, then \(20,000\times100=2,000,000\).

Step3: Round 2,146 to 2,000 and 121 to 100, then \(2,000\times100 = 200,000\).

Step4: Round 21,477 to 20,000 and 1,217 to 1,000, then \(20,000\times1,000=20,000,000\).

Answer:

The expression \(2,146\times121\) would have 200,000 as a reasonable estimate.