A= (45. 94+ 2. 69): (210. 38- 68. 2)
A= (210. 38+ 210.29): (210. 38- 38. 39)
A= [29. 38 (2+ 2. 3]: [29. 38(2- 1)]
A= (2+ 6): (2- 1)
A= 8: 1
A= 8
A = ( $4^{5}$ . $9^{4}$ + 2 . $6^{9}$ ) : ( $2^{10}$ . $3^{8}$ - $6^{8}$ . 2 )
A = 1 . 2 + 2 .3 + 3 . 4 + 4 . 5 + 5 . 6 + 6 . 7 + 7 . 8 + 8 . 9 + 9 . 10 + 10 .11
Tính 1) 4/5 +13/18 2) 3/7 -11/8 3) -7/10 - -4/5 4) 3/20 -1/25 5) 2/3 - 5/6 6) 1/4 + -3/8 - 19/10 7) -9/10 - -7/18 8) 3/10 - 11/18 9) 3/5 -5/6 + -7/12 10) -4/9 - (-5 )/6 - 3/8
Tính
A=1*2+2*3+3*4+4*5+5*6+6*7+7*8+8*9+9*10
tinh nhanh A = 1*2+2*3+3*4+4*5+5*6+6*7+7*8+8*9+9*10
Bài 1: Tính:
A= ((2^12 . 3^5 - 4^6 . 9^3 ) / 9( 2^2 . 3 )^6 + (8^4 . 3^5))) - ((5^10 . 7^3 - 25^2 . 49^2) / (( 125 . 7 )^3 + 5^9 . 14^3))
B= (2^9 . 27^3 + 15 . 4^9 . 9^4) / (6^9 . 2^0 + 12^10)
A=1-2+3+4-5-6+7+8-9-...+2007+2008-2009-2010
B=-1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016
C=(2+4+6+8+...+2014)-(3+5+7+9...+2011)
Tính giá trị biểu thức:
A=(4^5×9^4+2×6^9):(2^10×3^8-6^8×2)
CHO A=17+1/2+2/3+4/5+5/6+4/7+3/8+2/9+1/10 và
B=1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10
