问题 解答题
脱式计算,能简算的要简算.
①2013×0.25+2013×0.75
②1.25×32×0.25
③12×(
5
6
+
1
2
-
1
3

2
3
+(
5
6
-
3
4
)÷
3
8
答案

①2013×0.25+2013×0.75

=2013×(0.25+0.75)

=2013×1

=2013;

②1.25×32×0.25

=1.25×(8×4)×0.25

=(1.25×8)×(4×0.25)

=10×1

=10;

③12×(

5
6
+
1
2
-
1
3

=12×

5
6
+12×
1
2
-12×
1
3

=10+6-4

=16-4

=12;

2
3
+(
5
6
-
3
4
)÷
3
8

=

2
3
+
1
12
÷
3
8

=

2
3
+
2
9

=

8
9

问答题 简答题
单项选择题