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乘以五的和除以三又五分之二减一又三分之一是多少

(二又五分之二+一又三分之一×5)÷(三又五分之二减一又三分之一) =(2+2/5+5+5/3)÷(3+2/5-1-1/3) =(8+2/5+2/3)÷(1+2/5+2/3) =7÷(1+2/5+2/3)+1 =7÷(15/15+6/15+10/15)+1 =7÷31/15+1 =7×15/31+1 =85/31+1 =3又31分之23

(二又五分之二+一又三分之一×5)÷(三又五分之二减一又三分之一) =(2+2/5+5+5/3)÷(3+2/5-1-1/3) =(8+2/5+2/3)÷(1+2/5+2/3) =7÷(1+2/5+2/3)+1 =7÷(15/15+6/15+10/15)+1 =7÷31/15+1 =7×15/31+1 =85/31+1 =3又31分之23

四又五分之二除以三分之一减一点四乘(一加三分之一) =22/5÷1/3-1.4x(1+1/3) =4.4x3-1.4x4/3 =13.2-5.6/3 =39.6/3-5.6/3 =34/3 =11又1/3

3又3/4×2又2/5-2.4×1又1/2÷2 =3又3/4×2又2/5-2.4×(1又1/2÷2) =3又3/4×2又2/5-2.4×3/4 =(3又3/4-3/4)×2又2/5 =3×2又2/5 =7又1/5

4又2/5÷3/4-1.4×(1-1/3) =22/5×4/3-1.4×2/3 =88/15-14/15 =74/15

四减去二又五分之四和七分之二的积,所得的差再除以三又五分之三,商是多少? (4-2又4/5×2/7)÷3又3/5 =(4-4/5)÷3又3/5 =3.2÷3.6 =8/9

答案是四点八

【二又五分之四+(三又三分之二减2.75)除一又六分之五】除三又五分之一 =[2.8+(11/3-11/4)x6/11]x5/16 =(2.8+11/3x6/11-11/4x6/11)x5/16 =(2.8+2-1.5)x5/16 =3.3x5/16 =33/10x5/16 =33/32 请好评 如果你认可我的回答,敬请及时采纳, ~如果你认可...

(2又5分之3-1又5分之4)×2.8 =5分之4×2.8 =2.24

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