问题 解答题
计算下面各题.(能简便的要简便)
(1)(
1
6
+
1
2
-
1
3
)×18
(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
-
1
3
)×18,

=

1
6
×18+
1
2
×18-
1
3
×18,

=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.

选择题
单项选择题 A1/A2型题