Question

What is the correct numerical expression for "multiply the sum of 7 and 6 by the sum of 4 and 5?"

O 7+6x4+5
O (7+6) x (4+5)
O 7+(6x4) +5
O 7+6x (4+5)

Answer 1

(7+6) x (4+5)

Explanation:

Since both 7+6 and 4+5 are being added, the parenthesis around them shows that. Parenthesis come first in solving equations, so the steps would look like:

(7+6) x (4+5)

13 x 9

177

In any other equation, the wrong numbers would be multiplied. Like option 3, what would happen would be:

7+(6x4)+5

7+24+5

36