计算下面各题.720÷60+20×61+0.45÷0.9-0.251319×20-1319[1-(12-14)]×23.-数学

题目简介

计算下面各题.720÷60+20×61+0.45÷0.9-0.251319×20-1319[1-(12-14)]×23.-数学

题目详情

计算下面各题.
720÷60+20×6       
1+0.45÷0.9-0.25
13
19
×20-
13
19
[1-(
1
2
-
1
4
)]×
2
3
题型:解答题难度:中档来源:不详

答案

(1)720÷60+20×6,
=12+120,
=132;

(2)1+0.45÷0.9-0.25,
=1+0.5-0.25,
=1.5-0.25,
=1.25;

(3)class="stub"13
19
×20-class="stub"13
19

=class="stub"13
19
×(20-1),
=class="stub"13
19
×19,
=13;

(4)[1-(class="stub"1
2
-class="stub"1
4
)]×class="stub"2
3

=[1-class="stub"1
4
class="stub"2
3

=class="stub"3
4
×class="stub"2
3

=class="stub"1
2

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