24+6+2005
Tính nhanh
A=1×5×6+2×10×12+24×8×10/1×35+2×6×10+8×6×20
B=2006×2008-3/2005+2005×2008
C=18×123+9×4567×2+3×5310×6/1+4+7+.......+55+58-410
B=2006 * 2008 -3 / 2005 + 2005 * 2008
B=(2005+1)* 2008 -3 / 2005 +2005 *2008
B=2005 * 2008 + 2008 -3 / 2005 +2005*2008
B=2005 * 2008 + 2005 / 2005 +2005 * 2008
B= 1
Tính nhanh
câu a. 56 x 12 + 24 x 36 +24 x 36
câu b. 2005 x 178 - 77 x 2005 - 2005
a, 56 x 12 + 24 x 36 + 24 x36 = 56 x 12 + 12 x 2 x 36 + 12 x 2 x 36
= 56 x 12 + 12 x 72 + 12 x 72
= 12 x ( 56 + 72 + 72 )
= 12 x 200
= 2400
b, 2005 x 178 - 77 x 2005 - 2005 = 2005 x ( 178 - 77 - 1 )
= 2005 x 100
= 200500
**** mình nha nguyễn thùy trang
1) Tính nhanh
a) 3/8 + 7/12 + 10/16 + 10/24
b) 5/7 x 9/16 + 7/10 x 5/7
c) 4/6 + 7/13 + 17/9 + 19/13 + 1/9 + 14/6
d) 2005 x 2006 - 1/2004 x 2006 + 2005
a)=(3/8+10/16)+(7/12+10/24)
=1+1=2
c)=(4/6+14/6)+(7/13+19/13)+(17/9+1/9)
=3+2+2=7
Tìm chữ số tận cùng của:
a, 2^2016^2017
b,7^11^2017
c,24^6^2005
Tính nhanh mk tick:
2005 x 2008 x 5 x 6 x11 x13 x 1978 x 1979 x 24 x 8 x 26 x 11 = ???
\(\left(\dfrac{1}{9}\right)^{2005}.9^{2005}-96^2:24^2\)
\(\left(\dfrac{1}{9}\right)^{2005}.9^{2005}-96^2:24^2=\left(\left(\dfrac{1}{9}\right)^{2005}.9^{2005}\right)-\left(96^2:24^2\right)\)
\(=\left(\dfrac{1^{2005}}{9^{2005}}.9^{2005}\right)-\left(96^2:24^2\right)=\left(1^{2005}\right)-\left(\left(4.24\right)^2:24^2\right)\)
\(=1-\left(4^2\right)=1-16=-15\)
\(\frac{1}{9}^{2005}.9^{2005}-96^2:24^2\)
ban ơi là \(\frac{1^{2005}}{8}\)hay \(\left(\frac{1}{8}\right)^{2005}\)
1/8^2005.9^1005-96^2:24^2
=9/8^2005-4^2
den doan nay thi em chiu roi em moi hoc lop 6 thoi a
(2004*2005+2006*6-6)/(2005*197+4*2005)
(2004*2005+2006*6-6)/(2005*197+4*2005) = 10
tính nhanh: 2004*2005+2006*6-6/2005*197+4*2005