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:>>>>>>>>>>>>>>>> 26/11/2021 Bởi 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 Bình luận
$7r+2s+3t-2r+s+2t$ $=(7r-2r)+(2s+s)+(3t+2t)$ $=5r+3s+5t.$ — $12+6h+8k-5-3h+3k$ $=(12-5)+(6h-3h)+(8k+3k)$ $=7+2h+11k.$ — $2st+5st+9pn+7pn$ $=(2st+5st)+(9pn+7pn)$ $=7st+16pn.$ — $4mn-3nm+7gh-7gh$ $=4mn-3nm.$ Bình luận
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
$7r+2s+3t-2r+s+2t$
$=(7r-2r)+(2s+s)+(3t+2t)$
$=5r+3s+5t.$
—
$12+6h+8k-5-3h+3k$
$=(12-5)+(6h-3h)+(8k+3k)$
$=7+2h+11k.$
—
$2st+5st+9pn+7pn$
$=(2st+5st)+(9pn+7pn)$
$=7st+16pn.$
—
$4mn-3nm+7gh-7gh$
$=4mn-3nm.$