Question

which of the following is not equivalent to 78 ÷ 6?
a. (72 + 6) ÷ 6
b. (72 ÷ 6) + (6 ÷ 6)
c. (60 ÷ 6) + (18 ÷ 6)
d. (72 ÷ 6) + 6

Explanation:

Step1: Calculate target value

$78 \div 6 = 13$

Step2: Calculate Option A

$(72 + 6) \div 6 = 78 \div 6 = 13$

Step3: Calculate Option B

$(72 \div 6) + (6 \div 6) = 12 + 1 = 13$

Step4: Calculate Option C

$(60 \div 6) + (18 \div 6) = 10 + 3 = 13$

Step5: Calculate Option D

$(72 \div 6) + 6 = 12 + 6 = 18$

Answer:

D. $(72 \div 6) + 6$