Use front-end estimation with adjustment to estimate each of the following:

Question

a. 2345 + 5250 + 4210 + 910
b. 345 + 518 + 655 + 270

Answer 1

a. 2300 + 5300 + 4200 + 900 = 12,700.

b. 300 + 500 + 700 + 300 = 1800.