怎样简便怎样算:1013÷21922-125×1113÷7+15×2263(45-16+512)×601994×19931994-1993×19941994(20.2×0.4+7.88)÷4.2.-数

题目简介

怎样简便怎样算:1013÷21922-125×1113÷7+15×2263(45-16+512)×601994×19931994-1993×19941994(20.2×0.4+7.88)÷4.2.-数

题目详情

怎样简便怎样算:
10
13
÷2
19
22
-1
2
5
×
11
13
÷7+
1
5
×
22
63
4
5
-
1
6
+
5
12
)×60
1994×19931994-1993×19941994(20.2×0.4+7.88)÷4.2.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"10
13
÷2class="stub"19
22
-1class="stub"2
5
×class="stub"11
13
÷7+class="stub"1
5
×class="stub"22
63

=class="stub"10
13
×class="stub"22
63
-class="stub"7
5
×class="stub"11
13
×class="stub"1
7
+class="stub"1
5
×class="stub"22
63

=class="stub"10
13
×class="stub"22
63
-class="stub"1
5
×class="stub"11
13
+class="stub"1
5
×class="stub"22
63

=(class="stub"10
13
+class="stub"1
5
)×class="stub"22
63
-class="stub"11
65

=class="stub"63
65
×class="stub"22
63
-class="stub"11
65

=class="stub"22
65
-class="stub"11
65

=class="stub"11
65


(2)(class="stub"4
5
-class="stub"1
6
+class="stub"5
12
)×60,
=class="stub"4
5
×60-class="stub"1
6
×60+class="stub"5
12
×60,
=48-10+25,
=38+25,
=63;

(3)1994×19931994-1993×19941994,
=1994×19931994-1993×1994×10001,
=1994×19931994-1994×19931993,
=1994×(19931994-19931993),
=1994×1,
=1994;

(4)(20.2×0.4+7.88)÷4.2,
=(20.2×0.4+7.88)÷4.2,
=(8.08+7.88)÷4.2,
=15.96÷4.2,
=3.8.

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