Question

8. Which expression is equivalent

to 24 + 15?
A 2 X (12 + 7)
B 3 X (8 + 5)
C 5 x (8 + 3)
D 8 X (3 + 7)

Answer 1

B

Explanation:

Given

24 + 15 ← factor out 3 from each term

= 3(8 + 5)

As a check

24 + 15 = 39 and

3(8 + 5) = 3 × 13 = 39

Hence 24 + 15 = 3(8 + 5) → B

Answer 2

B
This is an expand the brackets question. So you multiply the number on the outside of the bracket by the numbers on the inside of the bracket.
3*8=24
3*5=15