Question

Describe the mental math steps you would use to find 7(42)

Answer 1

You would find 7*40 7*4=28
So 7*40=280 (just add a zero)
7*2=14
The answer would be 280+14=294

Answer 2

`7* 42 = 294`

Explanation:

Distributive property of multiplication over addition:

When a number is multiplied to a sum of two numbers then it can be multiplied to the numbers individually and then add the two products,

It can be written as:

`a* (b+c) = (a* b) + (a* c)`

Similarly, we can use this property to find the product of
`7* 42`

`7* 42\\= 7* (40+2)\\= (7* 40) + (7* 2)\\= 280 + 14\\= 294`

The product of 7 and 42 is 294.