问题 解答题

用简便方法计算下面各题.

(1)8.35×101-8.35

(2)(3.4×0.8+9.2×3.4)÷34÷0.05.

答案

(1)8.35×101-8.35,

=8.35×(101-1),

=8.35×100,

=835;

(2)(3.4×0.8+9.2×3.4)÷34÷0.05,

=[3.4×(0.8+9.2)]÷34÷0.05,

=[3.4×10]÷34÷0.05,

=34÷34÷0.05,

=1÷0.05,

=20.

单项选择题
单项选择题