1.1994+199.4+19.94+1.994

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1.1994+199.4+19.94+1.994
1.1994+199.4+19.94+1.994

1.1994+199.4+19.94+1.994
1994+199.4+19.94+1.994
=2000-6+200-0.6+20-0.06+2-0.006
=2222-6.666
=2215.334

1994+199.4+19.94+1.994
=1994(1+0.1+0.01+0.001)
=1994*1.111
=1.111(2000-6)
=2222-6.666
=2215.334

1.1994+199.4+19.94+1.994 1994+199.4+19.94+1.994 巧算：1994+199.4+19.94+1.994 1994+199.4+19.94+1.994=?199999+19999+1999+199+19=?如何简便运算?写出主要运算过程 简便运算：27×46÷79÷46×79÷27 19961997×19971996－19961996×19971997 1994﹢199.4﹢19.94﹢1.9949.1﹢9.2﹢9.3﹢9.4﹢……﹢10.7﹢10.8﹢10.9 89﹢899﹢8999﹢89999﹢899999 急要 1.111111*999999=2.7.5*43+19*2.5=3.1994+199.4+19.94+1.994=4.100+99+98-97-96-95+…+10+9+8-7-6-5+4+3+2-1=5.53*46+71*54+82*54=都答上过程来的、给优秀. 19.94-100+99-98+...+3-2+1简便计算 x-1+2-3+4-5+.-99+100=19.94解法 199.4×19.93-199.3×19. 19.94+99.7×99.8 x-1+2-3+4-5+6-7+8……-99+100=19.94x等于多少? 199.4*19.3-199.3*19.93巧算 20.06×1995－19.94×2006 19.94+99.7×99.8 help me 199.4*19.93-199.3*19.92的简便计算 简便计算:20.06×1995-19.94×2006 20.11乘1995减19.94乘2011 199.4乘19.93-199.3乘19.92 递等式199.4乘19.93-199.3乘19.92递等式