文档介绍：8÷8= ÷3= ÷7= 23÷25= ÷14= ÷28= 600 ÷50= 42×= 84×= × = ÷3=20×= ×6= 1000 ×= ÷27= 58× = ×52= ×= ×= ×= ×= ×= ×= × = × ×+ × × 99+= ×101-= 8÷()= ÷()= 452 ÷()= 70÷()= ÷()= 360 ÷()= =( )平方千米 ×= ÷= ÷= 33÷= 10÷= ÷= ÷= ÷= ÷= ÷= ÷= ÷= ÷= ÷63= ÷= += -= += -= += + (保两) × (保两) ÷+ - ÷(- ) ×【(+ )÷ 】以下简便运算 ×32× ++ -- - (- ) +++ - (+ ) - (+ ) +-+ ×12= 42×= 84×= 58×= ×52= 54×= 420 ×= ÷100 ×1000= 2871 ÷= 50-= 6×= ×= ×= ÷= ÷= ÷= 1、用竖式计算 ÷= ÷= ×22= ÷= ×= ÷ = ÷ = ×= ×= × × = ×= ×= ×15= ×= × = × = ×= ×= ×25= × × =(保留两位小数) ×= (用除法验算) × = × ≈ ÷= (用乘法验算) ÷= (保留三位小数) ÷= (商用循环小数表示) ×= ×= ×= ×= ×= ×= ÷29= ÷= ÷= 2、脱式计算(能简算的要简算) × ×4= ×99+ = × + = ×99+= ×50×= 64- ×=2 6× + ×24=( +) ×= + ×= ×(9. 6÷) ÷= ×1. 1×= × ×= ×- = ×+ = ×4. 5×= ×+= + ÷= × - × = ( - ) ×8= 32+ - = - × = × = ×99 + = × - ×= × × ×8= × + = ×101= ÷( - )×= 2. 13. ×0.×8257= ÷0