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6.4除以2.5 简便方法

=2.5*0.8*8,把6.4分成两个数在*2.5,一个数要缩小10倍

6.4÷2.5 =(6.4X40)÷(2.5X40) =256÷100 =2.56

6.4÷2.5=(6.4x0.4)÷(2.5x0.4)=6.4x0.4=2.56或6.4÷2.5=(8/5)=1.6=2.56

6.4-5.4÷2.5 =6.4-5.4*4÷2.5*4 =6.4-2.16 =4.24 2.3*0.48+0.48*8.7-0.48 =2.3+8.7-1*0.48 =10*0.48 =4.8 8.1*12.5 =8+0.1*12.5 =100+1.25 =101.25 27.36-1.43-4.36-4.57 =27.36-4.36-1.43+4.57 =23-6 =17

6.4/2.5/0.2=6.4/(2.5x0.2)=6.4/0.5=64/5=12.8如有帮助请采纳,

6除以2.5=6/2.5=24/10=2.1

(6.4+3.6)*10÷(0.4*10)=10*10÷4=100÷4=25

3.6*0.4+6.4÷2.5=3.6x0.4+6.4x0.4=(3.6+6.4)x0.4=10x0.4=4

(1)2.5*12.5*32=(2.5*4)*(12.5*8),=10*100,=1000;(2)6.4÷2.5÷0.4=6.4÷(2.5*0.4),=6.4÷1,=6.4;(3)5.4*0.36+0.64*5.4=5.4*(0.36+0.64),=5.4*1,=5.4;(4)9÷0.75+9÷0.25=12+36,=48;(5)17.2-0.71-0.29=17.2-(0.71+0.29),=17.2-1,=16.2;(6)8.6+1.4÷2.5=8.6+0.56,=9.16.

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