Question

Carl wants to find the product 30×56.

Which of the following best explains how he can find the product mentally?
A.


He knows that 30÷5 is 6. He then multiplies 6 by 6 to get 36.
B.


He knows that 30×66is 30. He then subtracts 1 from 30 to get 29.
C.


He knows that 3×6=18. He then adds 18 and 5 to get 23.
D.


He knows that 30×16is 5. He then multiplies 5 by 5 to get 25.

Answer 1

Your answer will be D. He knows that 30 × 16 is 5 then multiples 5 by 5 to get 25.