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简便计算: 1. 3.625÷5/32+6又2/5×3/8+6.4 2. 45÷5...

1. 3.625÷5/32+6又2/5×3/8+6.4 =3又5/8x32/5+32/5x3/8+6.4 =(3又5/8+3/8)x6.4+6.4 =4x6.4+6.4 =(4+1)x6.4 =5x6.4 =32 2. 45÷5/8+1.6+4.4×1又3/5 =45x8/5+8/5+4.4x8/5 =(45+1+4.4)x8/5 =(50+0.4)x8/5 =50x8/5+0.4x8/5 =80+0.64 =80.64 3. 8/9×【3...

注:\代表分号,/代表除号,2\1表示二分之一,5+4\1=5 4\1表示5又4/1(带分数) 5\6*5=6 5\4*2=5/8 2\1*4=2 4 4\5*2=2/5 3\1*5=3/5 7\2*6=7/12 5\2*6=5/12 3\5*2=3/10 5\7*2=5/14 5\6*1=5/6 7\9*2=7/18 5\4*2=5/8 2\45*0=0 5\6-5\4=5\2 2\1+2\1=1...

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