五年级下数学简便计算
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五年级数学小数加减法简便计算a+b=b+aa+b+c=a+(b+c)a-b-c=a-(b+c)5.93+0.19+2.813.07-0.38-1.627.3+2.7-7.3+2.71.27+3.9+0
一,口算205*0.4=11.2*0.9=1.080.8*0.5=40.25*0.4=0.11.25*0.8=13.3*0.2=0.661.8*0.3=0.540.105*0.1=0.0105(后面的
67.5÷0.125+32.5×8=67.5*8+32.5*8=(67.5+32.5)*8=100*8=80075.43÷0.01-25.43×100=75.43*100-25.43*100=(75.
题呢?
题在哪里?
计算什么.
43.2再问:求过程再答:50x0.8+4x0.8等于40+3.2等于43.2再问:哎呀,是58.9再答:?再答:你问下你爸妈是不是这个答案,算数不过关?再问:54.9×0.38再问:懂吗再问:你给我
3.29+0.73+2.273.29-0.73-2.277.5+2.5-7.5+2.57.325-3.29-3.3257.325-(5.325+1.7)7.325-(5.325-1.7)3.29+0.
一会上手写图稍等
16.8除以0.8=5x16.8÷4=5x4.2=21
五年级数学简便计算练习卷下面各题怎样算简便就怎样算.6.9+4.8+3.10.456+6.22+3.7815.89+(6.75-5.89)4.02+5.4+0.985.17-1.8-3.213.75-
五年级数学简便计算题下面各题怎样算简便就怎样算.6.9+4.8+3.10.456+6.22+3.7815.89+(6.75-5.89)4.02+5.4+0.985.17-1.8-3.213.75-(3
6x-0.4×6=9.6118-2×(4.1+X)=554x+80=1609.6÷X=0.84.8-X=3×(X+6)4.3X-1.5+3.2X=4.52.7X-1.6=38.9X÷4.5=20(0.
解题思路:主要应用加法交换律和结合律,及减法的性质简算。解题过程:1.5/2-(3/2+4/5)2.7/8+(1/8+1/9)3.5/6+(1/2+2/3)4.9/7-(2/7-10/21)5.3/7
http://wenwen.soso.com/z/q117383873.htm
6.9+4.8+3.10.456+6.22+3.7815.89+(6.75-5.89)4.02+5.4+0.985.17-1.8-3.213.75-(3.75+6.48)3.68+7.56-2.687
[(2.5*4)+(2.5*0.4)]*0.7=(10+1)*0.7=7.7---4与2.5相乘可以凑整6.3*10+6.3*0.3=63+1.89=64.89---把接近整数的数拆成一个比较整的数加
6.9+4.8+3.10.456+6.22+3.7815.89+(6.75-5.89)4.02+5.4+0.985.17-1.8-3.213.75-(3.75+6.48)3.68+7.56-2.687
175-75÷2568+35×13725-(125+237)(114+166)÷35432÷(9×8)189-60+40三、简便计算.216+30525×3247+236+646×(15×9)402+