Question

To find 42 times 25, double and halve.
A) 1050
B) 525
C) 2100
D) 3150

Answer 1

To find 42 times 25 using the method of doubling and halving, first double 42 to get 84. Then, halve 25 to get 12.5. Finally, multiply the doubled number by the halved number to get the answer of 1050.

Step-by-step explanation:

To find 42 times 25, we can use the method of doubling and halving.

First, double 42 to get 84. Then, halve 25 to get 12.5.

Next, multiply the doubled number (84) by the halved number (12.5).

84 multiplied by 12.5 is equal to 1050.

So, the answer is 1050 (A).