Use distributive property and mental math to find the product

7x49

We remember that the distributive propert is a (b+c) = ab+ac

2 ways we can do this is to write 49 as either 40+9 or 50-1

if we do 40+9

7 (49) = 7 (40+9) = 7 (40) + 7 (9) = 280+63=343

if we do 50-1

7 (49) = 7 (50-1) = 7 (50) + 7 (-1) = 350-7=343