怎样算式
56+31+24=(56+24)+31=80+31=111
615+475+125 =615+(475+125)=615+600=1215
125×64 =125×8×8=1000×8=8000
89+101+111=101+(89+111)=101+200=301
24+127+476+573 =(24+476)+(127+573)=500+700=1200
400-273-127=400-(273+127)=400-400=0
327+(96-127)=327-127+96=200+96=296
70×98=70×(100-2)=7000-140=6860
442-103-142 =442-142-103=300-103=197
999+99+9=1000+100+10-3=1110-=1107
67×5×2 =67×(5×2)=67×10=670
25×(78×4)=25×4×78=100×78=7800
72×125 =9×(8×125) =9×1000=9000
9000÷125÷8=9000÷(125×8)=9000÷1000=9
400÷25 =400÷100×4=4×4=16
25×36=25×4×9=100×9=90
103×27=(100+3)×27=2700+81=2781
76×102=76×(100+2)=7600+152=7752
3600÷25÷4 =3600÷(25×4)=3600÷100=36
99×35=(100-1)×35=3500-35=3465
(25+12)×4=25×4+12×4=100+48=148
56×27+27×44=(56+44)×27=100×27=2700
56×99+56 =56×(99+1)=56×100=5600
125×25×8×4=125×8×(25×4)=1000×100=100000
25×32×125 =(25×4)×(8×125)=100×1000=100000
10÷3.14-6.86÷3.14 =(10-6.86)÷3.14 =3.14÷3.14 =1
37.68÷0.25÷4 =37.68÷(0.25×4) =37.68÷1 =37.68
3.75-(2.75-1.3) =3.75-2.75+1.3 =1+1.3 =2.3
2.5×3.2×12.5 =(2.5×0.4)×(8×12.5) =1×100 =100
3.75-(2.8-1.25) =3.75+1.25-2.8=5-2.8 =2.2