Adunarea numerelor raționale pozitive Lesson

3 Slides • 2 Questions

1

Adunarea numerelor raționale pozitive

Pentru a aduna două fracții avem nevoie de numitor comun. Astfel se pune numitorul comun și se adună numărătorii.

\frac{2}{3}+\frac{7}{3}=\frac{2+7}{3}=\frac{9}{3}

2

Fracții care nu au același numitor

Pentru a aduna două fracții care nu au același numitor, aducem fracțiile la numitor comun (prin amplificare, sau simplificare).

3

4

Multiple Choice

Care este numitorul comun al fracțiilor:

\frac{5}{7}

și

\frac{8}{14}

1

7

2

14

3

8

4

5

Multiple Choice

$\frac{5}{12}+\frac{3}{7}=$

1

$\frac{36}{12}$

2

$\frac{35}{12}$

3

$\frac{71}{84}$

4

$\frac{24}{84}$

Adunarea numerelor raționale pozitive

Pentru a aduna două fracții avem nevoie de numitor comun. Astfel se pune numitorul comun și se adună numărătorii.

\frac{2}{3}+\frac{7}{3}=\frac{2+7}{3}=\frac{9}{3}

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