Question

9/10 use addition to decompose the fraction shown in the picture. you may write an equation or draw a model.

Explanation:

Step1: Choose decomposition parts

We can decompose $\frac{9}{10}$ into two fractions with the same denominator. Let's take $\frac{5}{10}$ and $\frac{4}{10}$.

Step2: Verify addition

Add the two fractions: $\frac{5}{10}+\frac{4}{10}=\frac{5 + 4}{10}=\frac{9}{10}$. (Note: There are other valid decompositions, e.g., $\frac{1}{10}+\frac{8}{10}$, $\frac{2}{10}+\frac{7}{10}$, etc.)

Answer:

$\frac{5}{10}+\frac{4}{10}=\frac{9}{10}$ (or other valid decompositions like $\frac{1}{10}+\frac{8}{10}$, $\frac{2}{10}+\frac{7}{10}$, $\frac{3}{10}+\frac{6}{10}$, $\frac{4}{10}+\frac{5}{10}$)