早教吧作业答案频道 -->其他-->
类型五:(提示:把83看作83×1,再用乘法分配律)83+83×9956+56×9999×99+9975×101-75125×81-12591×31-91.
题目详情
类型五:(提示:把83看作83×1,再用乘法分配律)
83+83×99 | 56+56×99 | 99×99+99 |
75×101-75 | 125×81-125 | 91×31-91. |
▼优质解答
答案和解析
(1)83+83×99
=83×(99+1)
=83×100
=8300
(2)56+56×99
=56×(99+1)
=56×100
=5600
(3)99×99+99
=99×(99+1)
=99×100
=9900
(4)75×101-75
=75×(101-1)
=75×100
=7500
(5)125×81-125
=125×(81-1)
=125×80
=10000
(6)91×31-91
=91×(31-1)
=91×30
=2730
=83×(99+1)
=83×100
=8300
(2)56+56×99
=56×(99+1)
=56×100
=5600
(3)99×99+99
=99×(99+1)
=99×100
=9900
(4)75×101-75
=75×(101-1)
=75×100
=7500
(5)125×81-125
=125×(81-1)
=125×80
=10000
(6)91×31-91
=91×(31-1)
=91×30
=2730
看了 类型五:(提示:把83看作8...的网友还看了以下:
因为:1³=1×1×1=1 2³=2×2×2=8 1³+2³=1+8=9 (1+2)²=3×3=9 2020-05-16 …
1/1X3+1/3X5+1/5x7+1/7+9+…+1/49x51=? 2020-05-17 …
1/5*7+1/7*9+1/9*11+1/11*13+1/13*15=?*是乘号 2020-05-17 …
(1\5+1\7+9\1+1\11)x(1\7+1\9+1\11+1\13)-(1\5+1\7+1 2020-06-03 …
用简便方法计算1/5*7+1/7*9+1/9*11+1/11*13+1/13*15 2020-07-17 …
几个我认为比较难的数列问题作公务员练习题的时候有几个做不出来了129.107.73.17.5.8. 2020-07-18 …
1.7/x²-1+8/x²-2x=37-9x/x^3-x²-x+12.3/x²+x-2=x/x-1 2020-07-18 …
1.420X40%/(1-40%)=?2.420X1/(1+2/5)3.(420X2/5)/(1+ 2020-07-19 …
方程1/x-7-1/x-5-1/x-6-1/x-4的解是x=11/2,而7+5+6+4/4=11/ 2020-07-31 …
计算一道数学题,(1+1/2)×(1+1/3)×(1+1/4)×(1+1/5)×(1+1/6)×(1 2020-11-30 …