-38.(25-4)+25.(-4+38)
= -38.21 + 25.34
= -789 + 850
= 61
cho mik nha mọi người
-38 . ( 25 - 4 ) + 25 . ( -4 + 38 )
= -38 . 21 + 25 . 34
= -798 + 850
= 52
thuc hien phep tinh
125 (28+72 ) - 25 (3^2 .4 +64 )
thuc hien phep tinh
19.126+37 .38
Thuc hien phep tinh
A/-120 - 18×(-5+6)
B/465+(-38)+(-465)+10+(-42)
THUC HIEN PHEP TINH ( TINH NHANH NEU CO THE ) :
1) ( 56 x 46 - 25 x 23 ) : 23
2) ( 28 x 54 + 56 x 36 ) : 21 : 2
3) ( 76 x 34 - 19 x 64 ) : ( 38 x 9 )
4) ( 2 + 4 + 6 + .... + 100 ) x ( 36 x 333 - 108 x 111 )
5) ( 5x 411 - 3 x 165 ) : 410
6) 7256 x 4375 - 725
3650 + 4375 x 7255
Thuc hien phep tinh :
a) 4 phan 5 + -7 phan 15 . 1, 25
b) 2 phan 5 + 3 phan 5 . ( 4 1phan2 - 3,25)
Bai 1:thuc hien phep tinh:
a)(-25).(-3).(-4)
b)17-25+55-17
c)35.18-5.7.28
d)_/_17/+2.[24:(_8)+(_5)2]
thuc hien phep tinh
a,C=35+38+41...92+95
b,10+12+14+...96+98
giup minh voi minh đang gấp lắm !!!!!!
thuc hien cac phep tinh hop ly neu co the
e)(-25).68 +(-34).(-250)
f)(-2)3(-3)2-32. (-4)3
thuc hien phep tinh:
a, -3+(-13)
b, (-51).12+12.(-49)
c, 317-12+8+(-217)
d, 25.(27-39)-27.(25-39)
