问题 解答题
计算各题,能简算的要简算.
3.4×12.5×0.085.4×2.8+7.2×5.48.8÷0.4÷28.7×9.9.
答案

(1)3.4×12.5×0.08,

=3.4×(12.5×0.08),

=3.4×1,

=3.4;

(2)5.4×2.8+7.2×5.4,

=5.4×(2.8+7.2),

=5.4×10,

=54;

(3)8.8÷0.4÷2,

=8.8÷(0.4×2),

=8.8÷0.8,

=11;

(4)8.7×9.9,

=8.7×(10-0.1),

=8.7×10-8.7×0.1,

=87-0.87,

=86.13.

判断题
填空题