Which of the following expressions shows how to use mental math to find 7×27 ? (1 point) 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)

Answer 1

To find \( 7 \times 27 \) using mental math, we can break it down as follows:

\[ 7 \times 27 = 7 \times (20 + 7) = (7 \times 20) + (7 \times 7) \]

So, the correct expression that shows how to use mental math for \( 7 \times 27 \) is:

(7×20)+(7×7) or 7 × 20 + 7 × 7 (both are correct).

The appropriate response based on the options you provided would be:

7 × 20 + 7 × 7.