问题
解答题
计算下面各题.(能简便的要简便) (1)(
(2)3.7×6+3.7×4 (3)1.25×32×0.25 (4)(50-40×1.2)÷0.5. |
答案
(1)(
+1 6
-1 2
)×18,1 3
=
×18+1 6
×18-1 2
×18,1 3
=3+9-6,
=6;
(2)3.7×6+3.7×4,
=3.7×(6+4),
=3.7×10,
=37;
(3)1.25×32×0.25,
=1.25×8×4×0.25,
=(1.25×8)×(4×0.25),
=10×1,
=10;
(4)(50-40×1.2)÷0.5,
=(50-48)÷0.5,
=2÷0.5,
=4.