为什么六轮车被称为6X6型,八轮称8X8,十轮称10X10型?WHY?
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为什么六轮车被称为6X6型,八轮称8X8,十轮称10X10型?WHY?
1x2+2x4+3x6+4x8 ------------------------------- 2x3+4x6+6x9+8x12简便方法啊（1x2+2x4+3x6+4x8 ）/（ 2x3+4x6+6x9+8x12）
（1x2+2x4+3x6+4x8）/（2x3+4x6+6x9+8x12)简便方法啊,
2/2x4+2/4x6+2/6x8.2/8x10+2/10x2
3x8+4x8+5x8+6x8+7x8+8x8+9x8+10x8 的简便运算
2x4+4x6+6x8+.+98x100
9又7/8x8+8又6/7x7+7又5/6x6+6又4/5x5
1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9+9x10+10x11
2/2x4＋2/4x6＋2/6x8＋2/8x10＋2/10x2＝
2/2x4＋2/4x6＋2/6x8＋2/8x10＋2/10x2＝
用规律计算：3/2x4+3/4x6+3/6x8+3/8x10+…+3/18x20
1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9=
2x3十4x6十6x9十8x12十10x15分之1x2十2x4十3x6十4x8十5x10.
3x-12X6=6一一一(5x-12)X8=24一一一(100-3x)÷2=8三题解方程谢谢了
3x一12X6=6 (5x一12)X8=24 (100一3x)÷2=8
计算：1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.
1、5x6/1+6x7/1+7x8/1+8x9/1+9x10/1+……+19x20/12
1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9+9x10+10x11+ +nx(n+1)=