Question

72/99 - 28/99 - 14/99 =

83,45 - 30,98 - 42,47 = 

Tính nhanh

Answer 1

72/99 - 28/99 -14/99 = 30/99 = 10/33

83,45 -30,98 -42,47 = 10 

bạn

Answer 2

72/99 - ( 28/99 + 14/99) = 72/99 - 42/99 = 30

83,45 - 30,98 - 42,47 = 83,45 - (30,98 +  42,47)= 83.45 - 73.45 = 10

Answer 3

\(\frac{72}{99}-\frac{28}{99}-\frac{14}{99}=\frac{72}{99}-\left(\frac{28}{99}+\frac{14}{99}\right)=\frac{72}{99}-\frac{42}{99}=\frac{30}{99}\) 

83,45-30,98-42,47

= 83,45-( 30,98+42,47)

=83,45-73,45

=10