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8 April, 21:30

Liz is using the distributive property to evaluate the expression 27 (36) by using friendlier numbers. Her work is shown below.

Liz's Work

27 (36)

Step 1

27 (3 + 12)

Step 2

27 (3) + 27 (12)

Step 3

81 + 324

Step 4

405

What was the first error that Liz made?

Step 1 should have been 27 (6 + 30).

Step 2 should have been 27 (3) + 12.

Step 3 should have been 27 (30) (12).

Step 4 should have been 16,244.

+4
Answers (2)
  1. 8 April, 21:42
    0
    Remove the negative exponent by rewriting (127) - 23 127 - ⁢ 23 as 27 23 27 23. 27 23 27 23 Rewrite 23 23 as a product. Tap for more steps ... (27 13) 2 27 13 2 Simplify. Tap for more steps ... 32 32 Raise 33 to the power of 22 to get 99.
  2. 8 April, 21:51
    0
    The answer is A. Step 1 should have been 27[6+30]
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