25/8-15/7x5/3÷45/7
(7\8-1\5)x5\6=
说出下面各算式的意义15x4 5x0.12 0.12x5 2/7x2/5 2/7x5 1÷0.125 4/1÷2/3 5
3/7X5/8的意义是( ) 3/2÷1/2的意义是( )
(1+2+3+4+5+6+7+8+9+10+11+12+13+14+15)x5=?
X1 - X3 - X4 -5X5=0 X1+2X2+3X3+3X4+7X5=0 X1+X2+X3+X4+X5=0 X2
(9/5X10/7-3/1)X5/6
宝马的 1 3 5 6 7 x3 x5 x6...
1.5X8.4+3X10分之3+25X10%= 4.5÷(24又7分之5-2.5%X800= 7.5X5分之4-5.5X
0.57X80.6+1.94X5.7
一道数学题巧算924/7X5
2.4X5+7x=19
1x5+2x5+3x5+4x5+5x5… 麻烦给我一个公式.