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小数脱式计算简便方法

408-12*24 = 408 - 288 = 120 (46+28)*60 = 74 x 60 = 444042*50-17 = 2100- 17 = 208332+105÷5 = 32 + 21 = 53420*(327-238) = 420 x 89 = 37380(4121+2389)÷7 = 6510 ÷7 = 9303.416÷(0.016*35) = 3.416 ÷0.56 = 6.10.8*[(10-6.76)÷1.2] = 0.8 x(3.

0.4*125*25*0.8 =(0.4*25)*(125*0.8)=10*100=1000 1.25*(8+10) =1.25*8+1.25*10=10+12.5=22.5 9123-(123+8.8) =9123-123-8.8=9000-8.8=8991.2 1.24*8.3+8.3*1.76 =8.3*(1.24+1.76)=8.3*3=24.9 9999*1001 =9999*(1000+1)=9999*1000+

1. 0.25*4/5+0.252. 5/9-3/7+4/9-4/73. 0.59*70+0.59*10+20*0.594. 46*9/10+54*9/105. (1/10+1/4)*406. 24*(3/8+5/6)7. 0.25*17*48. (3/4-3/5)*3/109. 7

0.5*16—16*0.2=4x 9.25-X=0.403 16.9÷X=0.3 X÷0.5=2.6 3-5x=80 1.8-6x=54 6.7x-60.3=6.7 9 +4x=40 0.2x-0.4+0.5=3.7 9.4x-0.4x=16.2 12-4x=20 1/3x+5/6x=1.4 12x+34x=1 18x-14x=12 23 x-5*14=14 12+34x=56 22-14x=12 (0.5+x)+x=9.8÷2 2(X+X+0.5)=9.8 25000+x=6x 3200=450+5X+X X-0.8X=6 12x-8x=4.8

脱式计算.408-12*24 (46+28)*60 42*50-1715÷532+105÷5 (108+47)*52 420*(327-238)(4121+2389)÷7 671*15-974 469*12+1492405*(3213-3189) 5000-56*23 125*(97-81)6942+480÷3 304*32-154 20+80÷4-20=100÷(32-30)*0= 25*4-12*5=70

小数加减法:1.8+3.9=3.7+8.4=5.6+1.4=2.9+4.5=2.8+4.7= 脱式计算:4.6+2.7-3.1==31.7+2.3+4.9==28.1-3.9+1.6==36.6-2.4-1.9==3.4+1.6+2.9== 简便计算:(9.6+10.4)+1.1==10+9.6+10+0.4==9.4+10.6-10== 1.4+1.4+2.2==56.8+43.2-10==

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1) 500+(407+0)= 2) 386+382+114= 3) 42+(91+158+109)= 4) (87+103+113)+97= 5) (246+387+154)+13= 6) 49+(71+151+129)= 7) 255+(79+45)=

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