G8

Grade 8 Unit 1 Lesson 7 P TE

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Final Check for Understanding

( Teacher Checks Work)

Directions: Estimate the decimal value. Use a calculator to check.

1. √ 78

Solution:

(^) √ 78 is between 8 and 9.
Calculator: (^) √ 78 ≈8.8

2. −√ 37

Solution:

√ 37 is between 6 and 7.

Recall, −√ 37 =(− 1 )⋅√ 37. Therefore, −√ 37 is between –6 and –7.

Calculator: −√ 37 ≈−6.1