Question

Explain how to find 40*50 using mental math?

Answer 1

Answer:

See Explanation

Step-by-step explanation:

We see that $40=4*10\\50=5*10$.  We can use this to find that $40*50=4*5*10*10=20*100=2,000$.

Answer 2

Answer:

2000

Step-by-step explanation:

 40

x 50

______

you multiply the 0 by 0 which is 0 and then you multiply the 0 by 4 and thats zero. then you multiply 5 by zero and then multiply five by 4 which is 20. that gives you 2000.