586×124+29×586-586×5321×(37+13+421+514)28×5+2×4×35+21×20+14×40+8×62512+135+338+216+625+413+58.-数学

题目简介

586×124+29×586-586×5321×(37+13+421+514)28×5+2×4×35+21×20+14×40+8×62512+135+338+216+625+413+58.-数学

题目详情

586×124+29×586-586×5321×(
3
7
+
1
3
+
4
21
+
5
14
28×5+2×4×35+21×20+14×40+8×625
1
2
+1
3
5
+3
3
8
+2
1
6
+6
2
5
+4
1
3
+
5
8
题型:解答题难度:中档来源:不详

答案

(1)586×124+29×586-586×53,
=(124+29-53)×586,
=100×586,
=58600;

(2)21×(class="stub"3
7
+class="stub"1
3
+class="stub"4
21
+class="stub"5
14
),
=21×class="stub"3
7
+21×class="stub"1
3
+21×class="stub"4
21
+21×class="stub"5
14

=9+7+4+10,
=16+4+10,
=30;

(3)28×5+2×4×35+21×20+14×40+8×62,
=28×5+2×4×7×5+3×7×4×5+14×2×20+8×62,
=28×5+28×10+28×15+28×20+8×62,
=28×(5+10+15+20)+8×62,
=28×50+8×62,
=1400+496,
=1896;

(4)5class="stub"1
2
+1class="stub"3
5
+3class="stub"3
8
+2class="stub"1
6
+6class="stub"2
5
+4class="stub"1
3
+class="stub"5
8

=(5class="stub"1
2
+4class="stub"1
3
)+(1class="stub"3
5
+6class="stub"2
5
)+(3class="stub"3
8
+class="stub"5
8
),
=9class="stub"5
6
+8+4,
=21class="stub"5
6

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