问题 计算题
选择合适的方法计算。
(1)22.5×(7.8+8.2)(2)13.8-0.416-2.584(3)1.25×0.25×3.2
(4)71.8×0.9+7.18(5)7.3×2.4-14×0.73
答案

(1)22.5×(7.8+8.2)

 =22.5×16

 =360(2)13.8-0.416-2.584

 =13.8-(0.416+2.584)

 =10.8(3)1.25×0.25×3.2

 =1.25×8×(0.4×0.25)

 =1

(4)71.8×0.9+7.18

 =71.8×(0.9+0.1)

 =71.8(5)7.3×2.4-14×0.73

 =7.3×(2.4-1.4)

 =7.3

单项选择题
单项选择题