问题 解答题
脱式计算,能简便计算的要简便计算.
3×(150-1530÷15)
[1-(
1
2
-
1
4
)]×
2
3
(1-0.95)÷0.01
11
15
+(
4
15
+
5
9
3.72×99+3.72
111
139
×140.
答案

(1)3×(150-1530÷15)

=3×(150-102)

=3×48

=144;

(2)[1-(

1
2
-
1
4
)]×
2
3

=[1-

1
4
2
3

=

1
2

(3)(1-0.95)÷0.01

=0.05÷0.01

=5;

(4)

11
15
+(
4
15
+
5
9

=(

11
15
+
4
15
)+
5
9

=1+

5
9

=1

5
9

(5)3.72×99+3.72

=3.72×(99+1)

=3.72×100

=372;

(6)

111
139
×140

=

111
139
×(139+1)

=

111
139
×139+
111
139

=111+

111
139

=111

111
139

故答案为144;

1
2
;5;1
5
9
;372;111
111
139

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