(-15)-3-7+8=( )
(-15)-3-7+8=( )
7/15- ()/3=2/15 ()/8-1/10=1/40
5+(-9)= 11-(+7)= (-12)-(+2.1)= -(-15)-(-8) (-2/3)
(x-15)/15=7/3
8/9-5/12= 7/15-3/20-1/20+3/15 =(7/15+3/15)-(3/20+1/20) =10/1
1、(8/15÷0.32-7/9×0.375)÷1 又3/8=
(3/8+1/15)x8+7/15(简算)
-11-6x=7+8x -3+2-7=4x-15-8x ( 解方程)
8/15分之8X15分之7=( ) 8分之5/4分之3/24分之1=( )
7/8-7/15*7/8=()(运用运算定律简算)
1/4*(-8/9)=?(-5/6)*(-3/10)=?-34/15*25=?(-0.3)*(-10/7)=?
找规律填空5 7 8 11 15() 1 3 8 15 24() 急,