简单的简便计算 求解答 怎样简便就怎样计算 跪求啊 ~~~~~~~
(9分之1-12分之1)×368分之5×5.3+5.7×8分之5-0.6259900÷1.25÷8055×66+66×77+77×88+88×77...
(9分之1-12分之1)×36 8分之5×5.3+5.7×8分之5-0.625
9900÷1.25÷80 55×66+66×77+77×88+88×77 展开
9900÷1.25÷80 55×66+66×77+77×88+88×77 展开
3个回答
2013-03-10 · 知道合伙人教育行家
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(9分之1-12分之1)×36
=1/9×36-1/12×36
=4-3
=1
8分之5×5.3+5.7×8分之5-0.625
=6.25×(5.3+5.7-1)
=6.25×10
=6.25
9900÷1.25÷80
=9900÷(1.25×80)
=9900÷100
=99
55×66+66×77+77×88+88×77(这小题你最后一个数77打错了,应该是99的)
55×66+66×77+77×88+88×99
=11×11×(5×6 + 6×7 + 7×8 + 8×9)
=121×(70+42+56+72)
=121×200
=24200
=1/9×36-1/12×36
=4-3
=1
8分之5×5.3+5.7×8分之5-0.625
=6.25×(5.3+5.7-1)
=6.25×10
=6.25
9900÷1.25÷80
=9900÷(1.25×80)
=9900÷100
=99
55×66+66×77+77×88+88×77(这小题你最后一个数77打错了,应该是99的)
55×66+66×77+77×88+88×99
=11×11×(5×6 + 6×7 + 7×8 + 8×9)
=121×(70+42+56+72)
=121×200
=24200
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(9分之1-12分之1)×36 = 1/9 * 36 - 1/12 *36 = 4 - 3 = 1;
8分之5×5.3+5.7×8分之5-0.625 = 5/8 * (5.3 + 5.7 - 1) = 25/4;
9900÷1.25÷80 = 9900 ÷ (1.25 * 80) = 99;
55×66+66×77+77×88+88×77 = 66 * (55 + 77) + 88 * 154 (这个好像没有简便方法)
8分之5×5.3+5.7×8分之5-0.625 = 5/8 * (5.3 + 5.7 - 1) = 25/4;
9900÷1.25÷80 = 9900 ÷ (1.25 * 80) = 99;
55×66+66×77+77×88+88×77 = 66 * (55 + 77) + 88 * 154 (这个好像没有简便方法)
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