Estimation and Calculation Strategies

The video tutorial explains how to determine whether to estimate or calculate an exact answer in math problems by identifying clue words. The word 'about' signals the need for estimation, while its absence indicates an exact calculation. Two examples are provided: one involving estimation and the other requiring an exact answer. The tutorial concludes with a reminder to use estimation when 'about' is present and to solve exactly when it is not.

What are the two main choices in problem-solving discussed in the video?

• Multiplying or dividing

• Adding or subtracting

• Guessing or checking

• Estimating or calculating exactly

Which clue word indicates that you should estimate rather than calculate exactly?

• Exactly

• About

• Precisely

• Approximately

In the dog and cat example, what is the estimated weight of the dog?

• 85 pounds

• 80 pounds

• 75 pounds

• 70 pounds

What is the first step in solving the estimation problem in the dog and cat example?

• Add the numbers directly

• Multiply the numbers

• Round the numbers

• Subtract the numbers

What is the purpose of rounding numbers in estimation?

• To decrease accuracy

• To simplify calculations

• To make calculations harder

• To increase accuracy

What is the rounded value of 57 in the dog and cat example?

• 55

• 50

• 65

• 60

What is the rounded value of 23 in the dog and cat example?

• 35

• 30

• 25

• 20

What is the sum of the rounded numbers 60 and 20 in the dog and cat example?

• 100

• 70

• 80

• 90

In the lion example, why is the calculation done exactly?

• Because the numbers are small

• Because the word 'about' is not used

• Because it involves subtraction

• Because the numbers are large

What is the exact weight of the mother lion in the example?

• 420 pounds

• 450 pounds

• 400 pounds

• 432 pounds