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五年级简便运算

(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10 (2)3.5-7+6.5 =3.5+6.5-7 =3 (3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25 (4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10 (5)12.5×7.4×0.8 =12.5×0.8×7.4 =74 (6)6.5×9.5+6.5×0.5 =6.5×(9....

(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10 (2)3.5-7+6.5 =3.5+6.5-7 =3 (3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25 (4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10

题目在哪里

75×102 =75*(100+2) =75*100+75*2 =7500+150 =7650 1.2×2.5 =(1+0.2)*2.5 =1*2.5+0.2*2.5 =2.5+0.5 =3 90.1-9.9 =(90+0.1)-(10-0.1) =90+0.1-10+0.1 =80+0.2 =80.2 90.1×9.9 =(90+0.1)*(10-0.1) =900-9+1-0.01 =908-0.01 =907.99 3....

小学数学五年级上册简便计算练习(160道) 请用简便方法计算下列各题 3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5 7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7) 3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8 0.25×0.28 0.125×3.2×2...

什么题

运算定律与简便运算 编辑 加法运算分为:加法交换律和加法结合律 乘法运算分为:乘法交换律、乘法结合律和乘法分配律 除法性质:商不变 减法性质: 差不变 小数性质 中文名 运算定律与简便运算 减法性质 商不变 除法性质 商不变 小数性质 商不变 ...

常见以下几类题型: 一、运用加法结合律进行简算 (a+b)+c=a+(b+c) 或a+b+c+d=(a+c)+(b+d) 例1、5.76+13.67+4.24+6.33 =(5.76+4.24)+(13.67+6.33) =10+10 =20 例2、37.24+23.79-17.24 =37.24-17.24+23.79 =20+23.79 =43.79 二...

简便运算 3.2×2.5×0.125 74.9÷ 0.25÷ 4 2.5×0.37× 0.04 3.68×7.8+2.2×3.68 3.8×0.6+62×0.06 4.7×9.9+0.47 24.98—(1.36+1.98) 4.69×10.1 3.2×2.5×0.125 74.9÷ 0.25÷ 4 2.5×0.37× 0.04 3.68×7.8+2.2×3.68 3.8×0.6+62×0.06 4.7×9.9+0.47 24.98—(1.3...

五年级奥数题计算题 1、0.2008+2.008+20.08+200.8+2008 =0.2008×(1+10+100+1000+10000) =0.2008×11110 =2230.888 2、1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)÷……÷(2007÷2008)=1×3/2×4/3×5/4×6/5×……×2008/2007 =2008 3、1+1/3+1/6+1/10+……+1/2009×...

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