Question

add using models 2
add the two decimal models.
use the sketch to help you.
what is their total?

Explanation:

Step1: Identify first decimal

The top model is a 10-column strip (tenths model) with 5 shaded columns, so it represents $\frac{5}{10} = 0.5$.

Step2: Identify second decimal

The bottom model is a 100-grid (hundredths model) with 7 shaded squares, so it represents $\frac{7}{100} = 0.07$.

Step3: Add the two decimals

Convert to a common place value and add.
$0.5 + 0.07 = 0.57$

Answer:

0.57