五年级数学脱式简便计算
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![五年级数学脱式简便计算](/uploads/image/f/1629820-28-0.jpg?t=%E4%BA%94%E5%B9%B4%E7%BA%A7%E6%95%B0%E5%AD%A6%E8%84%B1%E5%BC%8F%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
简便: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+49/9+4/76.8/9+15/36+3/277.5/2
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
(15.6+9.744/2.4)*0.52.881/0.43-3.5*0.2413.5*0.68/8.543.6-7.6*4.1(86.9+667.6)/50.3(73.5+80.5)/(10+12)
公式1:a-b-c=a-(b+c)10-0.432-2.5689.3-5.26-2.7413.4-(3.4+5.2)14.9-(5.2+4.9)18.32-5.47-4.3217.29-5.28-6.
第一单元:一、口算题(12分)4.4÷11=0.3×0.3=0÷730=0.03×10-0.1=7÷5=0.25÷0.5=0.53×7=125×0.5×0.8=1.9×0.5=29×5=2.3×0.8
题在哪里?
30.8÷[14-(9.85+1.07)][60-(9.5+28.9)]÷0.182.881÷0.43-0.24×3.520×[(2.44-1.8)÷0.4+0.15]28-(3.4+1.25×2.4
计算什么.
30.8÷[14-(9.85+1.07)][60-(9.5+28.9)]÷0.182.881÷0.43-0.24×3.520×[(2.44-1.8)÷0.4+0.15]28-(3.4+1.25×2.4
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
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
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
脱式计算就是把等号写在最左边,然后依次计算,的计算方式
http://wenwen.soso.com/z/q117383873.htm
请采纳,谢谢
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