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2200除以125巧算

2200除以125巧算怎么做 2200÷125 =2.2*1000÷125 =2.2*8 =17.6

2200÷5 =(2200×2)÷(5×2) =4400÷10 =440

2200➗25 =22x100÷25 =22x(100÷25) =22x4 =88

2200-105-95-106-94-107-93-108-92-109-91-110-90 =2200-[(105+95)+(106+94)+(107+93)+(108+92)+(109+91)+(110+90)] =2200-[200x6] =2200-1200 =1000

=678+(22*100+22*2) =678+2200+44 =2200+722 =2922 678 + 22*102 =2922 │ 22*22 22*100 │ │ │ │ │ │ └─┬─┘ │ . │ │ . └────┘

2200÷550 =2200÷(11×50) =2200÷11÷50 =200÷50 =4

1) 2200/25=2200*4/25*4=8800/100=88 2) 2200/25=2200*2/25*2=4400/50=88 3) 2200/25=(2200/5)/(25/5)=440/5=88 4) 2200/25=22*100/25=22*4*25/2522*4=88

分子分母化简即可。 原式=200/25=8

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