1.Tính nhanh
A,7256×4375-725/3650+4375×7255
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
7256*4375-725
3650+4375*7255
7256 x 4375 - 725
= 31745000 - 725
= 31744275
3650 + 4375 x 7255
= 3650 + 31740625
= 31744275
#)Giải :
\(\frac{7256.4375-725}{3650+4375.7255}=\frac{\left(7255+1\right)4375-725}{3650+4375.7255}=\frac{7255.4375+4375.1-725}{3650+4375.7255}=\frac{7255.4375+3650}{3650+4375.7255}=1\)
7256x4375-752
=31745000-752
=31744275
3650+4375x7255
=3650+31740625
=31744275
7256+4375-725/3650+4375-7255
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
7256 x 4375 - 725
3650 + 4375 x 7255
7256 * 4375 - 725 = 31745000 - 725 = 31744275
3650 + 4375 * 7255 = 3650 + 31740625 = 31744275
OK
a) 7256 * 4375 - 725 / 3650 + 4375 * 7255
b) 423134 * 846267 - 423133 / 423133 * 846267 + 423134
b) ( 7256 . 4375 - 725 ) : ( 3650 + 4375 . 7255 )
= ( 31745000 - 725 ) : ( 3650 + 31740625 )
= 31744275 : 31744275
=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
tính hợp lí:(456. 11 + 912) . 37 : 13 . 74
7256 . 4375-725 : 3650+ 4375 . 7255
1978 . 1979 + 1980 . 21 + 1958 : 1980 . 1979 - 1978 . 1979
mik cần câu trả lời gấp ạ, ai trả lời nhanh mik sẽ tick cho nha
(7256*4375-735)/(3650+4375*7255)