能简算的要简算(1)4.9÷710+3.7÷710-1.6÷710(2)40-15×(23+15)(3)98%×99+(1-1%)×2(4)89×[34-(716-0.25)](5)[154-(0.2+13)×4.5]÷0.125.-数学
题文
能简算的要简算 (1)4.9÷
(2)40-15×(
(3)98%×99+(1-1%)×2 (4)
(5)[
|
题文
能简算的要简算 (1)4.9÷
(2)40-15×(
(3)98%×99+(1-1%)×2 (4)
(5)[
|
题型:解答题 难度:中档
答案
(1)4.9÷
=4.9×
=(4.9+3.7-1.6)×
=(8.6-1.6)×
=7×
=10; (2)40-15×(
=40-15×
=40-10-3, =30-3, =27; (3)98%×99+(1-1%)×2, =98×99%+99%×2, =(98+2)×99%, =100×99%, =99; (4)
=
|