Tính nhanh : A = (6-2/3+1/2) - (5+5/3-3/2) - (3-7/3+5/2)
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)
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)
\(=\)
\(=\)
Tính nhanh :
A = ( 6 - 2/3 +1/2 ) - ( 5 + 5/3 - 3/2 ) - ( 3 - 7/3 + 5/2 )
= 6 - (5+3) - (2/3 + 5/3 -7/3) + ( 1/2 + 3/2 -5/2 )
= 6 - 8 - 0 - 1/2
= -2 - 1/2
= -2/1/2
A = 6 - 2/3 + 1/2 - 5 - 5/3 + 3/2 - 3 + 7/3 - 5/2
A = ( 6 - 5 - 3 ) + ( -2/3 - 5/3 + 7/3 ) + ( 1/2 + 3/2 - 5/2 )
A = ( -2 ) + 0 + ( -1/2 )
A = ( -2 ) + ( -1/2 )
A = -5/2
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)
thanks nha
Tính nhanh
1) A=1×5+2×6+3×7+...+20×24
2) A=1×2×3+2×3×5+3×5×7+...+21×23×25
1.Tính nhanh:
a,7/9*2/5+7/5*1/5+3/5*2/9
b,(2/5+6/7+8/9):(3/5+9/7+4/5)
d.(1/2+2/6+1/12+.....+1/9900)*(1/3+1/2+5/6)
bn nào làm xong và nhanh mk tick cho ha!!!!!!!
Thực hiện phép tính
1, A, 4.4³-225. B, 2³.3².5+120. C, 7⁵÷7³-2022⁰
D, 7².7³÷49+5³÷5²
2, a, (2³)² B, (3⁵)³÷9⁵ c, 3².3-3⁵÷3² D, 6⁶÷6³+4³.4²
Giúp mình nhanh với
1)
a) \(...=4^4-225=256-225=31\)
b) \(...=8.9.5+120=360-120=240\)
c) \(...=3^4-3^3=81-27=54\)
d) \(...=7^2-1=49-1=48\)
2) a) \(...=2^6=64\)
b) \(...=3^{15}:3^{10}=3^5=243\)
c) \(...=3^3-3^3=0\)
d) \(...=6^3+4^5=216+1024=1240\)
1. a) 31
b) 480
c) 48
d) 348
2. a) 64
b) 243
c) 0
d) 1240
Tính nhanh
A=2/1×3-4/3×5+6/5×7
B=3/2×4-5/4×6+7/6×8
Bài 1: Tính nhanh
a) -5/7-(-5/67) + 13/30 + 1/2 + (-11/6) + 17/14 - (-2/5) b) 3/5 : (-1/15 - 1-6) +3/5 : (1/3 + 16/15 c) (3 - 1/4 + 2/3)-(5 - 1/3 - 6/5) - (6 - 7/4 + 3/2) d) 1/3 + 1/3^2 + 1/3^3 +......+ 1/3^2004 + 1/3^2005 Mọi người giúp em với em cảm ơn ạ =))))))))
1.Tính nhanh
1+(-2)+3+(-4)+5+(-6)+.....+(-100)
2.Tính
A=1+(-3)+5+(-7)+.......+101
B=1+(-2)+(-3)+4+5+(-6)+(-7)+8+.....+2016