Question

Sue wants to use mental math to find 7x53. Write an expression she could use

Answer 1

7 × 50 = 350 and 7 × 3 = 21

350 + 21 = 371

Answer 2

50x7=350 and we need to make 371 because 53x7=371 So then you do 3x7=21 

Then  350+21=371  

Hope this helps!