Tính nhanh, tính hợp lý
347.22-22(216+184):8
\(\dfrac{7256\cdot4375-725}{3650+4375\cdot7255}\)
\(\frac{7256\cdot4375-725}{3650+4375\cdot7255}\)
\(\frac{7256\cdot4375-725}{3650+4375\cdot7255}\)
= (7255+1).4375-725/3650+4375.7255
=7255.4375+1.4375-725/4375.7255+3650
=7255.4375+4375-725/4375.7255+3650
=7255.4375+3650/4375.7255+3650
=1
\(\frac{7256\cdot4375-725}{3650+4375\cdot7255}\)
càn cách giải
7256 . 4375 - 725 / 3650 + 4375 . 7256
Ai nhanh mk tick
Cái / là phần
Đề bài là tính bằng cách hợp lý
7256 . 4375 - \(\frac{725}{3650}\) + 4375 . 7256
= (7256 . 4375 - 4375 . 7256) + \(\frac{725}{3650}\)
= 0 + \(\frac{725}{3650}\)
= \(\frac{725}{3650}\)
7256 x 4375 -725 / 3650 + 4375 x 7256
Tính nhanh :
a, 155 . 155 -155 . 41 : 114
b, 7256 . 4375 - 725 : 3650 + 4375 . 7255
" . " là dấu nhân nhé
155 . 155 -155 . 41 : 114
= 155( 155-41):114
=155.114:114
=155
(7256.4375 - 725)/(3650 + 4375.7255)
= [(7255 +1).4375 - 725]/(3650 + 4375.7255)
= [(7255.4375 + 1.4375 - 725]/(3650 + 4375.7255)
= (7255.4375 + 3650)/(3650 + 4375.7255) = 1
a) (155.155-155.41):114
= 155( 155-41):114
=155.114:114
=155
(7256.4375 - 725)/(3650 + 4375.7255)
= [(7255 +1).4375 - 725]/(3650 + 4375.7255)
= [(7255.4375 + 1.4375 - 725]/(3650 + 4375.7255)
= (7255.4375 + 3650)/(3650 + 4375.7255) = 1
tính hợp lí: 7256 . 4375 - 725: 3650 + 4375 . 7255
1978 . 1979 + 1980 . 21 + 1958: 1980 . 1979 - 1978 . 1979
mik cần câu trả lời gấp
1.Tính nhanh
A,7256×4375-725/3650+4375×7255
\(\dfrac{7256.4375-725}{3650+4375.7255}\)
\(=\dfrac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+1.4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+3650}{3650+4375.7255}=1\)
\(\dfrac{7256.4375-725}{3650+4375.7255}=\dfrac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+4375-725}{3650+4372.7255}=\dfrac{7255.4375+3650}{3650+4375.7255}=1\)
7256*4375-725/3650+4375*7255
7256*4375-725/3650+4375*7255
= 7256 * 4375 + 4375 * 7255 - 29/146
= 4375* ( 7256+7256) -29/146
= 4375* 14512 -29/146
= 63490000- 29/146