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脱式计算(能用简便方法的用简便方法计算)2.5×(6...

(1)2.5×(6+5×3.2)=2.5×(6+16)=2.5×22=55;(2)45×7.3+27×4.5=45×7.3+2.7×45=45×(7.3+2.7)=45×10=450; (3)5.8×101-5.8=5.8×(101-1)=5.8×100=580;(4)0.125×3.2×25=0.125×(8×0.4)×25=(0.125×8)×(0.4×25)=1×10=10;(5)[8.3...

(9.5-13/6.5)/2.5 =7.5/2.5 =3

8.2-9.6x0.5 =8.2-4.8 =3.4

你好: 谷哥22为您解答:5.64+2.6×3.7 =5.64+9.62 =15.26 望采纳,谢谢!!! 理由:有加减乘除的,先算乘除法,再算加减法。

(1)0.389×4×0.25,=0.389×(4×0.25),=0.389×1,=0.389;(2)4.02×3.02+4.02×6.98,=4.02×(3.02+6.98),=4.02×10,=40.2;(3)4.05÷0.81+2.4,=5+2.4,=7.4;(4)65.4÷2.5÷4,=65.4÷(2.5×4),=65.4÷10,=6.54;(5)86×9.9,=86×(10...

(1)7.5×2.3+1.9×2.5=17.25+4.75=22;(2)(78.6-0.786×25十75%×21.4)×2011÷75,=(78.6-78.6×0.25+75%×21.4)×2011÷75,=[(1-0.25)×78.6+0.75×21.4]×2011÷75,=[0.75×78.6+0.75×21.4]×2011÷75,=(78.6+21.4)×0.75×2011÷75,=100×0.75×20...

(1)[8.5-(3.6+3.6)]÷2.6=[8.5-7.2]÷2.6=1.3÷2.6=0.5;(2)10.1×87=(10+0.1)×87=10×87+0.1×87=870+8.7=878.7;(3)1.4×[(7.5+38.4)÷0.9]=1.4×[45.9÷0.9]=1.4×51=71.4.

①11.23-3.4+8.77-6.6=11.23+8.77-(3.4+6.6)=20-10=10;②5.4÷[0.68÷(1.2-1.03)]=5.4÷[0.68÷0.17]=5.4÷4=1.35;③(3.24×99+3.24)÷8.1 =[3.24×(99+1)]÷8.1=324÷8.1=40;④(18.4-3.75)÷12.5÷0.8=14.65÷12.5÷0.8=14.65÷(12.5×0.8)=14.65÷10...

(1)0.25×500×0.2,=0.25×(500×0.2),=0.25×100,=25;(2)[16.7-(6.2+9.5)]×8.3,=[16.7-15.7]×8.3,=1×8.3,=8.3;(3)0.9+99×0.9,=0.9×(99×1),=0.9×100,=90;(4)10.1×87,=(10+0.1)×87,=87×10+0.1×87,=870+8.7,=878.7.

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