Tính nhanh a = 1/3 - 3/4 - 3/5 + 1/72 - 2/9 - 1/36 + 1/15
Tính nhanh: A = 1/3 - 3/4 - ( - 3/5 ) + 1/72 - 2/9 - 1/36 + 1/15
A=1/3-3/4-[-3/5]+1/72-2/9-1/36+1/15
a,1/3 -3/4 - (-3/5) + 1/72-2/9-1/36 +1/15
b, 1/5 - 3/7 + 5/9 -1/11 + 7/13 - 9/16 - 7/13 + 2/11 -5/9 + 3/7 -1/5
help me pls
Tính nhanh:
A = 1/3 - 3/4 - (-3/5) + 1/72 - 2/9 - 1/36 + 1/15
A=1/3-3/4-(-3/5)+1/72-2/9-1/36+1/15=.................?
co like
Tính nhanh:A=1*5*6+2*10*12+3*15*18+4*20*24+5*25*30/1*3*5+2*6*10+3*9*15+4*12*20+5*15*25
tính nhanh A=1/3-3/4-(-3/5)+1/72-2/9-1/36+1/15
B=1/5-3/7+5/9-2/11+7/13-9/6-7/13+2/11-5/9-3/7-1/5
C1/100-1/100.99-1/99.98-1/98.87-...-1/3.2-1/2.1
