12 1 2 6 15 1 5 3 ()2 6 2
1/2+3/4-6/5 6/7-1/2+4/5 3/4-(7/12-5/7) 2/3+(13/15+1/3) 15/9-
(-12)*(-1/2+2/3-5/6)
1*2*3+2*4*6+3*6*9+4*8*12+5*10*15分之1*3*5+2*6*10+3*9*15+4*12*2
计算:(1)(-1/15+2/3-5/6)×|-30|
(1/3/12+2/6/24+3/9/36+4/12/48)/(2/3/5+4/6/10+6/9/15+8/12/20)
1×3×5+2×6×10+3×9×15+4×12×20+5×15×25/1×2×3+2×4×6+3×6×9+4×8×12
15+(-2)+5+(-1)+10+(-3)+(-2)+12+4+(-5)+6等于多少?
15/16÷(5/12÷5/8+3/8) 6/7-6/7×(2/3+1/9) 【1-(1-2/3÷
(1*3*5+2*6*10+3*9*15)/(2*4*6+4*8*12+6*12*18)
2*3+4*6+6*9+8*12+10*15+12*18+14*2分之1*2+2*4+3*6+4*8+5*10+6*12
计算1×3×5+2×6×10+3×9×15+4×12×20+5×15×251×2×3+2×4×6+3×6×9+4×8×1
(1*3*5+2*6*10+3*9*15+4*12*20+5*15*25)/(1*2*3+2*4*6+3*6*9+4*8