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6. How could you check the answer to 27-15 12 using addition?A. 27 15 12B. 27 12 15C. 12 15 27D. 15-12 277. Which of the following uses estimation to check 267 -154 113?A. 300 200 100B. 113 154 267C. 270 150 120D. 300 150 1508. Subtract the quotient of 18 and 2 from the sum of 22 and 9.A. 5B. 23C.4D. 22LPFU

6 How could you check the answer to 2715 12 using additionA 27 15 12B 27 12 15C 12 15 27D 1512 277 Which of the following uses estimation to check 267 154 113A class=

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nobillionaireNobley
27 - 15 = 12
Adding 15 to both sides, we have,
27 - 15 + 15 = 12 + 15
i.e. 27 = 12 + 15
Answer: C [12 + 15 = 27]

To calculate by estimation, round each number to the nearest ten, hundred, ets as the case may be.
Here, rounding to the nearest ten, we have,
267 - 154 = 270 - 150 = 120.
Answer: C

Quotient of 18 and 2 = 18/2 = 9
Sum of 22 and 9 = 22 + 9 = 31
Subtracting the quotient of 18 and 2 from the sum of 22 and 9, we have:
31 - 9 = 22
Answer: D

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