A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
A=26+27+28+29+30+31+32+33
A=(26+33)+(27+32)+(28+31)+(29+30)
A=59+59+59+59=59x4=236
A= 26+ 27+28+29+30+31+32+33
Tính nhanh: A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
A = (26 + 33) + (27 + 32) + (28 + 31) + (29 + 30)
A = 59 + 59 + 59 + 59
A = 59 . 4
A = 236
Tính nhanh: A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
Cách 1:
A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
= (26 + 33) + (27 + 32) + (28 + 31) + (29 + 30)
= 59 + 59 + 59 + 59 = 59.4 = 236
Cách 2:
A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
= 26 + (27 + 33) + (28 + 32) + (29 + 31) + 30
= 26 + 60 + 60 + 60 + 30
= 26 + 210
= 236.
A= 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
A= 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
A=(26+33)+(27+32)+(28+31)+(29+30)
A=59+59+59+59
A=59.4
A=236.
A =26+ 27+ 28+ 29+ 30+ 31+ 32+ 33
A=26 +27+28+29+30+31+32+33
tu 26 den 33 co (33-26):1+1=8 (so hang)
tong (33+26).8:2=236
vay kq la 236
Tính nhanh :
A = 26 + 27 + 28 +29 + 30 + 31 + 32 + 33.
A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
=> A = ( 26 + 33 ) + ( 27 + 32 ) + ( 28 + 31 ) + ( 29 + 30 )
=> A = 59 + 59 + 59 + 59
=> A = 59 x 4
=> A = 236
26 +27 + 28 + 29 + 30 + 31 + 32 + 33
= ( 33 + 26 ) x 8 : 2 = 236
A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
A = ( 26 + 33 ) + ( 27 + 32 ) + ( 28 + 31 ) + ( 29 + 30 )
A = 59 + 59 + 59 + 59
A = 59 x 4
A = 236
tính nhanh
a=26+27+28+29+30+31+32+33+
cộng j dằng sau 33 nx vậy
a=26+27+28+29+30+31+32+33
=26+(27+33)+(28+32)+(29+31)+30
=26+60+60+60+30
=26+210
=236
Học Tốt
a=(27+33)+(28+32)+(29+31)+26+30
a=60+60+60+26+30
a=236