1/100-1/100.99-1/99.98-.....1/3.2-1/2.1
= 1/100-(1/100.99+1/99.98+.....+1/3.2+1/2.1)
=1/100-(1/1-1/2+1/2-1/3+...+1/98-1/99+1/99-1/100)
=1/100-(1/1-1/100)
=1/100-99/100
=-98/100
=-49/50
Tính nhanh:
A= 1/100 - 1/100.99 - 1/99.98 - 1/98.97 - ... - 1/3.2 -1/2.1
3)Tính nhanh (nếu có):
e)1/100-1/100.99-1/99.98-...-1/3.2-1/2.1
g)-15,5.20,8 + 3,5.9,2 - 15,5.9,2 + 3,5.20,8
3)Tính nhanh (nếu có):
e)1/100 - 1/100.99 - 1/99.98 - ... - 1/3.2 - 1/2.1
g) -15,5 . 20,8 + 3,5.9,2 - 15,5.9,2 + 3,5.20,8
D=1/100 - 1/100.99 - 1/99.98 -...-1/3.2 -1/2.1
C = 1/100 - 1/100.99 - 1/99.98 - 1/98.97 - .... - 1/3.2 - 1/2.1
1/100-1/100.99-1/99.98-...-1/3.2-1/2.1
3)Tính nhanh (nếu có):
e)1/100-1/100.99-1/99.98-...-1/3.2-1/2.1
g)-15,5.20,8+3,5.9,2-15,5.9,2+3,5.20,8
Tính : 1/100.99 - 1/99.98 - 1/98.99 ... - 1/3.2 - 1/ 2.1
Tính:
1/100.99 - 1/99.98 - 1/98.97 - ... - 1/3.2 -1/2.1
