问题 解答题
脱式计算,能简算的就简算
1
2
+
1
6
+
1
12
)×12
15
16
+(
7
16
-
1
4
)÷
1
12
18
19
÷9+
1
19
×
1
9
1
3
÷(1-
5
6
)×
3
4
答案

①(

1
2
+
1
6
+
1
12
)×12

=

1
2
×12+
1
6
×12+
1
12
×12

=6+2+1

=9;

15
16
+(
7
16
-
1
4
)÷
1
12

=

15
16
+
3
16
×12

=

15
16
+
36
16

=

51
16

18
19
÷9+
1
19
×
1
9

=

1
9
×(
18
19
+
1
19

=

1
9
×1

=

1
9

1
3
÷(1-
5
6
)×
3
4

=

1
3
×6×
3
4

=

3
2

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