计算题;4分之3*9分之8+3分之1 2/9*10-2/9 (3/5+9/10)*5/6 7/8*4/15*8 (3/4*8/9)*16 8/9*8+8/9120*(1/2+1/3+1/4) 1/5*7/12+1/5*5/12
问题描述:
计算题;4分之3*9分之8+3分之1 2/9*10-2/9 (3/5+9/10)*5/6 7/8*4/15*8 (3/4*8/9)*16 8/9*8+8/9
120*(1/2+1/3+1/4) 1/5*7/12+1/5*5/12
答
4分之3*9分之8+3分之1
=3分之2+3分之1
=1
2/9*10-2/9
=9分之2×9
=2
(3/5+9/10)*5/6
=3/2×5/6
=5/4
7/8*4/15*8
=28/15
(3/4*8/9)*16
=2/3×16
=32/3
8/9*8+8/9
=8/9×9
=8
120*(1/2+1/3+1/4)
=120×2分之1+120×3分之1+120×4分之1
=60+40+30
=130
1/5*7/12+1/5*5/12
=1/5×【7/12+5/12】
=1/5×1
=1/5