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脱式计算,能简便计算的要简便计算.3×(150-1530÷15)[1-(12-14)]×23(1-0.95)÷0.011115+(415+59)3.72×99+3.72111139×140.

题目详情
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.
▼优质解答
答案和解析
(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