用你喜欢的方法计算352.5×55%+60.5×5.5+42.5×1120423×1019+419×9232003×2001200219×(225+319)×25.-数学

题目简介

用你喜欢的方法计算352.5×55%+60.5×5.5+42.5×1120423×1019+419×9232003×2001200219×(225+319)×25.-数学

题目详情

用你喜欢的方法计算
352.5×55%+60.5×5.5+42.5×
11
20
4
23
×
10
19
+
4
19
×
9
23

2003×
2001
2002
19×(
2
25
+
3
19
)×25.
题型:解答题难度:中档来源:不详

答案

(1)352.5×55%+60.5×5.5+42.5×class="stub"11
20

=352.5×0.55+60.5×5.5+42.5×0.55,
=(352.5+42.5)×0.55+60.5×5.5,
=395×0.55+605×0.55,
=(395+605)×0.55,
=1000×0.55,
=550;

(2)class="stub"4
23
×class="stub"10
19
+class="stub"4
19
×class="stub"9
23

=class="stub"10
23
×class="stub"4
19
+class="stub"4
19
×class="stub"9
23

=(class="stub"10
23
+class="stub"9
23
)×class="stub"4
19

=class="stub"19
23
×class="stub"4
19

=class="stub"4
23


(3)2003×class="stub"2001
2002

=(2002+1)×class="stub"2001
2002

=2002×class="stub"2001
2002
+class="stub"2001
2002
×
1,
=2001+class="stub"2001
2002

=2001class="stub"2001
2002


(3)19×(class="stub"2
25
+class="stub"3
19
)×25,
=class="stub"2
25
×25×19+class="stub"3
19
×19×25,
=38+75,
=113.

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