Question

use any strategy
use models or visua
2.5 + 1 ½
write a story
how do you know you
answer is correct?

Explanation:

Step1: Convert mixed number to decimal

$1\frac{1}{2} = 1.5$

Step2: Add the two decimals

$2.5 + 1.5 = 4$

Answer:

4

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Additional required components:

Write a story:

Lila walked 2.5 miles to the park, then walked another $1\frac{1}{2}$ miles to her friend's house. In total, she walked 4 miles.

Use models or visuals:

Draw 3 whole circles, split one circle into 10 equal parts. Shade 2 full circles plus 5 parts for 2.5. Then draw 1 full circle plus 5 parts (for $1\frac{1}{2}=1.5$). Combine the shaded parts: 3 full circles plus 10 parts, which equals 4 full circles.

How do you know your answer is correct?

Subtract one addend from the total: $4 - 2.5 = 1.5$, which is equal to $1\frac{1}{2}$. This confirms the sum is correct.