问题 解答题
计算下列各题,能简算的要简算.
3.75×
3
5
+
3
5
×1.25

0.25×1.25×32
5
7
+
2
3
+1
1
3
+8
2
7
1
4
+
5
6
+
1
12
)÷
1
12
5.36-1.86-3.146.8×8+3.5×8-44.
答案

(1)3.75×

3
5
+
3
5
×1.25,

=(3.75+1.25)×

3
5

=5×

3
5

=3;

(2)0.25×1.25×32,

=0.25×1.25×8×4,

=(0.25×4)×(1.25×8),

=1×10,

=10;

(3)

5
7
+
2
3
+1
1
3
+8
2
7

=(

5
7
+8
2
7
)+(
2
3
+1
1
3
),

=9+2,

=11;

(4)(

1
4
+
5
6
+
1
12
)÷
1
12

=(

1
4
+
5
6
+
1
12
)×12,

=

1
4
×12+
5
6
×12+
1
12
×12,

=3+10+2,

=15;

(5)5.36-1.86-3.14,

=5.36-(1.86+3.14),

=5.36-5,

=0.36;

(6)6.8×8+3.5×8-44,

=(6.8+3.5)×8-44,

=10.3×8-44,

=82.4-44,

=38.4.

单项选择题
单项选择题