问题 解答题
计算下面各题,怎样简便就怎样算.
(1)45.36÷7.2-2.5×0.2(2)5.12-(4.65-4.88)
(3)2.7÷4+6.3×0.5(4)9.43×1.1
(5)0.25×12.5×3.2(6)30.8×0.35+6.5×3.08.
答案

(1)45.36÷7.2-2.5×0.2,

=6.3-0.5,

=5.8;

(2)5.12-(4.65-4.88),

=5.12-4.65+4.88,

=(5.12+4.68)-4.65,

=10-4.65,

=5.35;

(3)2.7÷4+6.3×0.5,

=0.675+3.15,

=3.825;

(4)9.43×1.1,

=9.43×(1+0.1),

=9.43+0.943,

=14.198;

(5)0.25×12.5×3.2,

=0.25×12.5×0.8×4,

=(0.25×4)×(12.5×0.8),

=1×10,

=10;

(6)30.8×0.35+6.5×3.08,

=3.08×3.5+6.5×3.08,

=3.08×(3.5+6.5),

=3.08×10,

=30.8.

单项选择题
单项选择题