(10-4/55*1)+(9-4/55*2)+(8-4/55*3)+...+(2-4/55*9)+(1-4/55*10)
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/09 16:20:36
(10-4/55*1)+(9-4/55*2)+(8-4/55*3)+...+(2-4/55*9)+(1-4/55*10)=?
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![(10-4/55*1)+(9-4/55*2)+(8-4/55*3)+...+(2-4/55*9)+(1-4/55*10)](/uploads/image/z/5377599-63-9.jpg?t=%2810-4%2F55%2A1%29%2B%289-4%2F55%2A2%29%2B%288-4%2F55%2A3%29%2B...%2B%282-4%2F55%2A9%29%2B%281-4%2F55%2A10%29)
(10-4/55*1)+(9-4/55*2)+(8-4/55*3)+...+(2-4/55*9)+(1-4/55*10)
=10+9+8+7+6+5+4+3+2+1-4/55*(1+2+3+4+5+6+7+8+9+10)
=55-4/55*55
=51
=10+9+8+7+6+5+4+3+2+1-4/55*(1+2+3+4+5+6+7+8+9+10)
=55-4/55*55
=51
(10-4/55*1)+(9-4/55*2)+(8-4/55*3)+...+(2-4/55*9)+(1-4/55*10)
简便计算:1/55+2/55+3/55+4/55+5/55+6/55+7/55+8/55+9/55+10/55-11/1
简算(10-55分之4×1)+(9-55分之4×2)+(8-55分之4×3)+……+(2-55分之4×1)+(1-55分
简算10-55分之4×1)+(9-55分之4×2)+(8-55分之4×3)+……+(2-55分之4×1)+(1-55分之
(1+2+3+4+5+6+7+8+9+10)÷55=?
vb 显示1+2+3+4+5+6+7+8+9+10=55
简便计算,(10-7/55*1)+(9-7/55*2)+(8-7/55*3)+...+(1-7/55*10)
(10-3/55×1)+(9-3/55×2)+(8-3/55×3)+……+(2-3/55×9)+(1-3/55×10)=
1+2+3+4+5+6+7+8+9+10+11+22+33+44+55+66+77+88+99=?
10:22,5:30,9:55,10:50,1:30;2:40,3:10,4:58,6:18,7:48,8:15,9:4
55+45+1+2+3+4+6+7+8+9=
观察:1+2+3+4+5+6+7+8+9+10=(1+10)*(10÷2 )=11*5=55