(1)120+290÷58*16 (2)5/6*11+5/6 (3)(2/3-2/5)*(1/8+1/12)简算

问题描述:

(1)120+290÷58*16 (2)5/6*11+5/6 (3)(2/3-2/5)*(1/8+1/12)
简算

(1)120+290÷58*16 =120+50×16=120+800=920
(2)5/6*11+5/6 =55/6+5/6=60/6=10
(3)(2/3-2/5)*(1/8+1/12)=(10/15-6/15)*(3/24+2/24)
=4/15*5/24=1/18

(1)=120+5*16=120+80=200
(2)=55/6+5/6=60/6=10
(3)=2(1/3-1/5)*(3/24+2/24)=(4/15)*(5/24)=1/18

(1)120+290÷58*16
=120+29*10÷(29*2)*16
=120+5*16
=120+80
=200
(2)5/6*11+5/6
=5/6*(11+1)
=5/6*12
=10
(3)(2/3-2/5)*(1/8+1/12)
=2*(1/3-1/5)*1/4*(1/2+1/3)
=1/2*2/15*5/6
=1/18

(1)120+290÷58*16
=120+290*16÷(29*2)
=120+(290÷29)*(16÷2)
=120+10*8
=120+80=200
(2)5/6*11+5/6
=(5/6)*(11+1)
=12*5/6
=5*12/6
=5*2=10
(3)(2/3-2/5)*(1/8+1/12)
=(10/15-6/15)*(3/24+2/24)
=(4/15)*(5/24)
=(4/24)*(5/15)
=(1/6)*(1/3)
=1/18