Question

Tính:

\(B=\left(\dfrac{12}{13}+7\right)+\left(-8+\dfrac{1}{13}\right)\)

Answer 1

=12/13+7-8+1/13

=(12/13+1/13)+(7-8)

=1+(-1)

=0

Answer 2

=12/13+7-8+1/13

=(12/13+1/13)+(7-8)

=1+(-1)

=0

Answer 3

B= \(\left(\dfrac{12}{13}+\dfrac{1}{13}\right)\)+7-8

B=0

Answer 4

B=12/13 + 7 + (-8) + 1/13 

B=(12/13 + 1/13) + (-8 + 7)

B=1 + (-1)

B=0

Answer 5

B =\(\dfrac{12}{13}\) + 7 -8+\(\dfrac{1}{13}\)

B =(\(\dfrac{12}{13}\)+\(\dfrac{1}{13}\))+(7-8)

B =(-1)+1

B =0

Answer 6

Ta có: \(B=\left(\dfrac{12}{13}+7\right)+\left(-8+\dfrac{1}{13}\right)\)

\(=\left(\dfrac{12}{13}+\dfrac{1}{13}\right)+\left(7-8\right)\)

\(=1-1=0\)