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7.8ⅹ10.9ⅹ28.8=简便计算

89X0.362十8·9x6·28 =89X0.362十89x0.628 =89X(0.362+0.628) =89X0.99 =89X(1-0.01) =89-0.89 =88.11

(1)3.72x3.5+6.28x3.5 =(3.72+6.28)*3.5 =10*3.5 =35 (2)36.8-3.9-9.1 =36.8-(3.9+9.1) =36.8-13 =23.8 (3)15.6x13.1-15.6x2.1-15.6 =15.6*13.1-15.6*3.1 =15.6*(13.1-3.1) =15.6*10 =156

解:依题意得算式, 46分之9×12分之11÷23分之22 =46分之9×12分之11×22分之23 =46分之9×22分之23×12分之11 =44分之9×12分之11 =16分之3 即46分之9×12分之11÷23分之22=16分之3

1. (25%-695%-12%)*36 2. 3/4*3/5+3/4*2/5 3. (1-1/4+8/9)/7/9 4 2/3+1/6/3/24+2/21 5 1*8/15*3/5 6 10-3/4/9/10-1/6 7 [(1/3+1/2)/5/6-1/3]/1/7 8 2/3/5+3/5/2+3/4 9 1/[(2-2/3/1/2)]*2/5 10 3^2*3.25678 11 3^3-5 12 4^2-34% 13 3.25-315% 14 ...

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