7r+2s+3t-2r+s+2t=
12+6h+8k-5-3h+3k=
2st+5st+9pn+7np=
4mn-3nm+7gh-7gh=
nhớ giải thích các bước giải:>>>>>>>>>>>>>>>>
7r+2s+3t-2r+s+2t= 12+6h+8k-5-3h+3k= 2st+5st+9pn+7np= 4mn-3nm+7gh-7gh= nhớ giải thích các bước giải:>>>>>>>>>>>>>>>>
By Ximena
By Ximena
7r+2s+3t-2r+s+2t=
12+6h+8k-5-3h+3k=
2st+5st+9pn+7np=
4mn-3nm+7gh-7gh=
nhớ giải thích các bước giải:>>>>>>>>>>>>>>>>
Đáp án:
5r+3s+5t
3h+11k+7
7st+16pn
4mn-3nm
Giải thích các bước giải:
7r+2s+3t-2r+s+2t
= (7r-2r)+(2s+s)+(3t+2t)
= 5r+3s+5t
12+6h+8k-5-3h+3k
= (6h-3h)+(8k+3k)+(12-5)
= 3h+11k+7
2st+5st+9pn+7pn
= (2st+5st)+(9pn+7pn)
= 7st+16pn
4mn-3nm+7gh-7gh
= 4mn-3nm
$7r+2s+3t-2r+s+2t$
$=(7r-2r)+(2s+s)+(3t+2t)$
$=5r+3s+5t.$
—
$12+6h+8k-5-3h+3k$
$=(12-5)+(6h-3h)+(8k+3k)$
$=7+2h+11k.$
—
$2st+5st+9pn+7pn$
$=(2st+5st)+(9pn+7pn)$
$=7st+16pn.$
—
$4mn-3nm+7gh-7gh$
$=4mn-3nm.$