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990 55简便计算递等式

(720+270)÷55-120÷24 =990÷55-120÷(12*2) =990÷110*2-120÷12÷2 =9*2-10÷2 =18-5 =13 =================== (63+480÷16)-29 =(63+30*16÷16)-29 =63+30-30+1 =64

你好!49*102-2*49=(102-2)*49=100*49=490025*5+74*5+5=(25+74+1)*5=100*5=500(40+8)*125=40*125+8*125=5000+1000=6000

99*55+55递等式计算等于多少=55*(99+1)=55*100=5500

1. =990÷55-5=90÷5-5=18-5=132. =63+30-29=643. =10.7+25.8=36.54. =7.06+(13.78-2.78)=7.06+11=18.06

99x55=100x55-55=5500-55=5445

3300÷55用递等式计算3300÷55=(11*5*60)÷(11÷5)=60

99*55=(100-1)*55=5500-55=5445

99x55+55=99x55+55X1=55(99+1)=5500

解:99x25=(100-1)x25=100X25-25=2500-25=2475

=(99+1)*55 =100*55 =5500

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