能简便的用简便方法算 x:2/5=5/8(90 4.5 45简便运算)
(8+2/5)X5/8怎样算简便
(8+2/5)X5/8=8x5/8+2/5x5/8=5+1/4=5.25
2/5x=5/8+1/3x怎么解答
解:2/5x=5/8+1/3x2/5x-1/3x=5/8 6/15x-5/15x=5/81/15x=5/8x=5/8*15x=75/8
2.02x8.5怎样用简单的方法算
展开全部2.02X8.5=(2+0.02)X8.5=2x8.5+0.02x8.5=17+0.17=17.17
18.1 - 2.8*5.5能简便的要用简便方法计算
展开全部18.1-2.8x5.5=18.1-2.8x5-2.8x0.5=18.1-14-1.4=4.1-1.4=2.7
x - 2/7=5/18简便方法
原式=18/7-18/5+9/2 =(18/7-18/5)+9/2 =18/2+9/2 =9/1+9/2 =9/3 =3/1
计算.能简便的要简便.5/6 - 18/+1/6 - 5/8
3/7+1/2-3/7简便计算=(3/7-3/7)+1/2=1/2;5/7-1/6+5/14简便计算7=(10/14+5/14)-1/6=15/14-1/6=90/84-14/84=76/84;=19/21;7/12-(5/6-5/12)简便计算=(7/12+5/12)-5/6=1-5/6=.
25X5X2的简便方法?
25X5X2=25x(5x2)=25x10=250 希望能帮到你!
510➗2➗5的简便方法
510➗2➗5=510➗(2*5)=510➗10=51
0.2*7.125*5用简便方法计算
0.2*7.125*5=0.2*5*7.125=1*7.125=7.125
36x2又5/8简便算法
36x2又5/8; =36x(2+5/8); =36x2+36x5/8; =72+9x5/2; =72+45/2; =72+22.5; =94.5