12×1/4 15×3/5
12/7-(1/3÷7/15+4/5)简算
(1/15+1/12)*3+1/15X=4/5
(1)12^13(3^10*4^11) (2) (5^4*3^3-5^3*3^2+5^2*3)/15
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
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
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-
计算(能简算的要简算) 15/16-(2/3+1/4) 1/4-7/12+3/4-5/12
1*2*3*4+3*6*9*12+5*10*15*20/3*4*5*6+9*12*15*18+15*20*25*30简算
(2-3/4×4/5)÷(1/12+4/15)简算!
(14/5+4/1-7/5)*28 4-4*8/3-8/1 30*(15/4+5/3+10/7) (12/5+4/3-6
数学简算题,1/2*3+1/2*53*(2/15+1/12)-2/51/3+3-(1/4+1/12)3/4*5/7*4/
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