能简算的一定要简算1011×113×13×11(45+310)×1031349×21+28×134939÷7+31×17(34+58)×3299×598.-数学

题目简介

能简算的一定要简算1011×113×13×11(45+310)×1031349×21+28×134939÷7+31×17(34+58)×3299×598.-数学

题目详情

能简算的一定要简算
10
11
×
1
13
×13×11
4
5
+
3
10
)×
10
3
13
49
×21+28×
13
49
39÷7+31×
1
7
3
4
+
5
8
)×32
99×
5
98
题型:解答题难度:中档来源:不详

答案

(1)class="stub"10
11
×class="stub"1
13
×13×11,
=(class="stub"10
11
×11)×(class="stub"1
13
×13),
=10×1,
=10;

(2)(class="stub"4
5
+class="stub"3
10
)×class="stub"10
3

=class="stub"4
5
×class="stub"10
3
+class="stub"3
10
×class="stub"10
3

=class="stub"8
3
+1,
=3class="stub"2
3


(3)class="stub"13
49
×21+28×class="stub"13
49

=class="stub"13
49
×(21+28),
=class="stub"13
49
×49,
=13;

(4)39÷7+31×class="stub"1
7

=39×class="stub"1
7
+31×class="stub"1
7

=(39+31)×class="stub"1
7

=70×class="stub"1
7

=10;

(5)(class="stub"3
4
+class="stub"5
8
)×32,
=class="stub"3
4
×32+class="stub"5
8
×32,
=24+20,
=44;

(6)99×class="stub"5
98

=(98+1)×class="stub"5
98

=98×class="stub"5
98
+1×class="stub"5
98

=5+class="stub"5
98

=5class="stub"5
98

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