8.下面各题对吗?把不对的改正过来、 (1)5-3x7/9=2x7/9=14/9 (2)4/11+2/11x11/6=6
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:2024/06/22 06:02:01
8.下面各题对吗?把不对的改正过来、 (1)5-3x7/9=2x7/9=14/9 (2)4/11+2/11x11/6=6/11x11/6
![8.下面各题对吗?把不对的改正过来、 (1)5-3x7/9=2x7/9=14/9 (2)4/11+2/11x11/6=6](/uploads/image/z/20075503-31-3.jpg?t=8.%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98%E5%AF%B9%E5%90%97%3F%E6%8A%8A%E4%B8%8D%E5%AF%B9%E7%9A%84%E6%94%B9%E6%AD%A3%E8%BF%87%E6%9D%A5%E3%80%81+%281%295-3x7%2F9%3D2x7%2F9%3D14%2F9+%282%294%2F11%2B2%2F11x11%2F6%3D6)
这是运算顺序混乱造成的. 1.=5-7/3=8/3; 2.=4/11+2/3=34/33
2/1x3+2/3X5+2/5x7=2/7x9+2/9x11
2x2/1x3+4x4/3x5+6x6/5x7+8x8/7x9+10x10/9x11+12x12/11x13 仔细看看
1/1x3+1/3x5+1/5x7+1/7x9+1/9x11=?
把下面的等式改写成比例.(1)3X40=8X15 (2)5分之3X7分之4=5分之4X7分之3
已知1-1/3=2/1x3,计算1/1x3+1/3x5+1/5x7+1/7x9+1/9x11=
7^4-3x7^2-8x7^3化简
(2X2)/1X3+(4X4)/(3X5)+(6X6)/(5X7)+...+(20X20)/(19X21)==?
某同学在做一道题:求代数式10x9+9x8+8x7+7x6+6x5+5x4+4x3+3x2+2x+1当x=-1时的值.由
1+2X3+4X5+6X7+8X9=303
求下面算式中”囗”所表示的数 (1)(囗+6)/7-2.5=3.5 (2)(囗x7一囗一囗)/4
2/7X7=4分之1X7分之5+4分之1X7分之2+4分之1 98除以(15分之1除以7分之2)
3x5=15,而4的2次方-1=15 5x7=35,而6的二次方-1=35 .11x13=143而12的二次方-1=14