Question

tinh nhanh 100-99 + 88-77 +66-55+ 44-33 +22-11

Answer 1

= 1 + 11 + 11 + 11 + 11 = 1 + 4 . 11 = 1 + 44 = 45 

Answer 2

\(100-99+88-77+66-55+44-33+22-11\\ =\left(100-99\right)+\left(88-77\right)+\left(66-55\right)+\left(44-33\right)+\left(22-11\right)\\ =1+11+11+11+11\\ =1+11\times4\\ =1+44\\ =45\)

Answer 3

\(100-99+88-77+66-55+44-33+22-11\)

\(=1+11+11+11+11\)

=45

Answer 4

100−99+88−77+66−55+44−33+22−11=(100−99)+(88−77)+(66−55)+(44−33)+(22−11)=1+11+11+11+11=1+11×4=1+44=45

  nha hok tốt nhé  

Answer 5

100−99+88−77+66−55+44−33+22−11

=(100−99)+(88−77)+(66−55)+(44−33)+(22−11)

=1+11+11+11+11

=1+11×4

=1+44

=45