G8

Grade 8 Unit 1 Lesson 7 P TE

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Structured Guided Practice

(A/B Partners Practice)

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

1. (^) √ 40
   Solution:
   √^40 is between 6 and 7 or 6 <√^40 < 7.
   Calculator: √ 40 ≈6.3


2. 
   

   −√ 28
   2
   Solution:
   Recall −√ 228 =(−1) 2 ⋅√^28 , therefore −√ 228 will fall between -2 and - 3 or −3 <−√ 228 <− 2
   Calculator: −√^282 ≈−2.6