Question

1 trừ 2 phần 7 trừ 1 phần 4

Answer 1

\(1-\dfrac{2}{7}-\dfrac{1}{4}=\dfrac{7}{7}-\dfrac{2}{7}=\dfrac{1}{4}=\dfrac{5}{7}-\dfrac{1}{4}=\dfrac{20}{28}-\dfrac{7}{28}=\dfrac{13}{28}\)

Answer 2

13/28

Answer 3

\(1-\dfrac{2}{7}-\dfrac{1}{4}=\dfrac{13}{28}\)

Answer 4

\(1-\dfrac{2}{7}-\dfrac{1}{4}=\dfrac{28}{28}-\dfrac{8}{28}-\dfrac{7}{28}=\dfrac{28-8-7}{28}=\dfrac{13}{28}\)

Answer 5

\(1-\dfrac{2}{7}-\dfrac{1}{4}=\dfrac{13}{28}\)

Answer 6

1/1 - 2/7 - 1/4

= 28/28 - 8/28 - 7/28

= 13/28

Answer 7

1- 2/7 -1/4

= 28/28 - 8/28 - 7/28

= 13/28

Answer 8

1- 2/7- 1/4

= 5/7 - 1/4 

=  19/28

Answer 9

\(\dfrac{13}{28}\)

Answer 10

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