Which of the following expressions shows how to use mental math to find 7×27
?
Responses
(7×20)+(7×7)
7 × 20 + 7 × 7
(7×49)+(9×4)
7 × 49 + 9 × 4
(9×50)+(9×7)
9 × 50 + 9 × 7
(9×50)+(7×9)
1 answer
The expression (7×20)+(7×7) shows how to use mental math to find 7×27.