a: \(=5^2+16\cdot125-1=24+2000=2024\)
b: \(=-145+55+42-42+90=-90+90=0\)
c: =-4+2+6+8-10+13-15=4+8-10-2=12-10-2=0
a: \(=5^2+16\cdot125-1=24+2000=2024\)
b: \(=-145+55+42-42+90=-90+90=0\)
c: =-4+2+6+8-10+13-15=4+8-10-2=12-10-2=0
Câu 2: Thực hiện phép tính:
a) 6\(^2\) : 4 + 2 . 5\(^2\)
b) 79 . 82 + 18 . 79
c) 7\(^2\) - 3\(^2\) - ( 4\(^5\) : 4\(^3\) + 2\(^8\) : 2\(^6\) )
d) 16 + { 400 : [ 200 - ( 42 + 46 . 3) ] }
thực hiện phép tính
2*31*12+4*6*42+8*27*3
tính nhanh
a,(-3/4 + 5/13):2/7-(2/1/2+8/13):2/7
b,-3/5:(-1/15-1/6)+3/5:(-1/3-1/1/15)
c,(3-1/4+2/3)-(5-1/3-6/5)-(6-7/4+3/2)
tính nhanh
a,(-3/4 + 5/13):2/7-(2/1/2+8/13):2/7
b,-3/5:(-1/15-1/6)+3/5:(-1/3-1/1/15)
c,(3-1/4+2/3)-(5-1/3-6/5)-(6-7/4+3/2)
tính nhanh
a,(-3/4 + 5/13):2/7-(2/1/2+8/13):2/7
b,-3/5:(-1/15-1/6)+3/5:(-1/3-1/1/15)
c,(3-1/4+2/3)-(5-1/3-6/5)-(6-7/4+3/2)
Tính nhanh:
5) 42 . ( 15+ 96) + 6 . ( 25 + 4) . 7
6) 45 . ( 13 + 78) + 9. ( 87+22) . 5
thực hiện phép tính
1-2-3+4+5-6-7+8+9-10-11+......................-78+80
giúp mk nha
Câu 1:
a) -8 + 5
b) -6 - 10
c) (-50) . (-9)
d) (-45) : 9
e) 24 . 125 + 24 . 75
g) 42 - 7 . 25
h) (5-7) . 11
i) (-3 - 12) : (-5)
k) 3 . (-4)^2 + 2 . (-5)
l) 125 . (-15) . 8
1,Tính
A, 14/7 + 5/9 + 4/9 - 2
B, 31/25 + ( 15/16 - 6/15 ) + 1/16
C, 23/28 - ( 23/28 - 1/3 ) +2/3
D, 1/12 + 1/20 + 1/30 + 1/42 + 1/56 + 1/72 + 1/90