Question

1 + 2/3
1 - 2/3
1x 2/3
1 : 2/3

Answer 1

5/3

1/3

2/3

3/2

Answer 2

5/3

1/3

2/3

3/2

Answer 3

\(1+\dfrac{2}{3}=\dfrac{3}{3}+\dfrac{2}{3}=\dfrac{5}{3}\)

\(1-\dfrac{2}{3}=\dfrac{3}{3}-\dfrac{2}{3}=\dfrac{1}{3}\)

\(1\times\dfrac{2}{3}=\dfrac{2}{3}\)

\(1\div\dfrac{2}{3}=1\times\dfrac{3}{2}=\dfrac{3}{2}\)

Answer 4

5/3

1/3

2/3

3/2

Answer 5

\(1+\dfrac{2}{3}=\dfrac{3}{3}+\dfrac{2}{3}=\dfrac{3+2}{3}=\dfrac{5}{3}\)

\(1-\dfrac{2}{3}=\dfrac{3}{3}-\dfrac{2}{3}=\dfrac{3-2}{3}=\dfrac{1}{3}\)

\(1\cdot\dfrac{2}{3}=\dfrac{2}{3}\)

\(1:\dfrac{2}{3}=1\cdot\dfrac{3}{2}=\dfrac{3}{2}\)

(Chú ý: Dấu \(\cdot\) là phép nhân, lên lớp 6 sẽ học, tạm thời viết x)