Unit 2 Test Study Guide

For each expression, without calculating, determine if the solution would be closer to 0.1, 0.5, or 1.

• 0.01+0.09

• 1

• 0.5+0.4

• 0.5

• 0.01+0.49

• 0.1

Jessica and MacKenna each timed their own quarter-mile run with a stopwatch. Jessica says that she ran the quarter-mile in 74.5 seconds. MacKenna was more precise. She reported her run as 81.34 seconds. Estimate how many seconds faster Jessica runs than MacKenna by rounding to the nearest whole second.

Mathematical Equivalence

ON

Estimate the sum of 0.7 and 0.64.

Mathematical Equivalence

ON

What is the sum of 0.7 and 0.64?

Mathematical Equivalence

ON

Estimate the sum of 56.7 and 0.82.

Mathematical Equivalence

ON

Estimate the difference of 73.73 and 1.123.

Mathematical Equivalence

ON

Find the actual difference of 73.73 and 1.123.

Mathematical Equivalence

ON

The following times were recorded for each runner in a four-person relay.

What was the difference between the fastest and slowest runners?

Mathematical Equivalence

ON

The following times were recorded for each runner in a four-person relay.

What was the total time for all four runners?

Mathematical Equivalence

ON

Estimate the product of 5.32 and 4.3.

Mathematical Equivalence

ON