Câu hỏi của Meii Quynz

Question

làm giúp tớ với ạ

⭐Hannie⭐ · Accepted Answer

`7/23 + 4/17 - 7/23 + 13/17``= (7/23 - 7/23)+( 4/17 + 13/17)``= 0 + 17/17``= 0+ 1= 1``----------``b)` đề ko rõbài `2``a) 7/8 + x= 3/5``=> x= 3/5- 7/8``=>x=-11/40``b) 1/2 x - 2/5=1/5``=> 1/2 x = 1/5 + 2/5``=> 1/2 x =3/5``=>x= 3/5 : 1/2``=>x=3/5 xx 2``=>x= 6/5``c) |x+1|=2``TH1``x+1=2``=>x=2-1``=>x=1``TH2``x+1=-2``=>x= -2-1``=>x=-3``d)(2-x)(4/5-x)=0``TH1``2-x=0``=>x= 2-0``=>x=2``TH2``4/5-x=0``=>x=4/5-0``=>x=4/5`Câu trả lời: `7/23 + 4/17 - 7/23 + 13/17``= (7/23 - 7/23)+( 4/17 + 13/17)``= 0 + 17/17``= 0+ 1= 1``----------``b)` đề ko rõbài `2``a) 7/8 + x= 3/5``=> x= 3/5- 7/8``=>x=-11/40``b) 1/2 x - 2/5=1/5``=> 1/2 x = 1/5 + 2/5``=> 1/2 x =3/5``=>x= 3/5 : 1/2``=>x=3/5 xx 2``=>x= 6/5``c) |x+1|=2``TH1``x+1=2``=>x=2-1``=>x=1``TH2``x+1=-2``=>x= -2-1``=>x=-3``d)(2-x)(4/5-x)=0``TH1``2-x=0``=>x= 2-0``=>x=2``TH2``4/5-x=0``=>x=4/5-0``=>x=4/5`

⭐Hannie⭐ · Answer

`b)19 1/4 - 7/12- 15 1/4 -7/12``= ( 19 1/4 - 15 1/4 ) -( 7/12- 7/12)``= 4 -0``=4`Câu trả lời: `b)19 1/4 - 7/12- 15 1/4 -7/12``= ( 19 1/4 - 15 1/4 ) -( 7/12- 7/12)``= 4 -0``=4`

Câu hỏi

Khoá học trên OLM (olm.vn)