Hello!
To solve 40 × 50 using mental math, you can use an easier way to solve it.
Take the first digits f the numbers (4) and (5).
Multiply those:
4 × 5 = 20
Now, ypu need to add the 0s from 40 and 50 to this number.
2000
You add the amount of 0s the numbers have to the new number, and that's your answer!
