Question

circle the zero pairs in each model. find the

1. $-4 + 5 = $

red dots (4) and yellow dots (5) image

1. $2 + (-5) = $

yellow dots (2) and red dots (5) image

Explanation:

Question 5:

Step1: Identify zero pairs

There are 4 red dots (representing $-4$) and 5 yellow dots (representing $+5$). A zero pair is a red dot and a yellow dot (since $-1 + 1 = 0$). We can form 4 zero pairs (because there are 4 red dots).

Step2: Calculate remaining dots

After forming 4 zero pairs, the number of remaining yellow dots is $5 - 4 = 1$. So, $-4 + 5 = 1$.

Question 7:

Step1: Identify zero pairs

There are 2 yellow dots (representing $+2$) and 5 red dots (representing $-5$). A zero pair is a yellow dot and a red dot (since $1 + (-1) = 0$). We can form 2 zero pairs (because there are 2 yellow dots).

Step2: Calculate remaining dots

After forming 2 zero pairs, the number of remaining red dots is $5 - 2 = 3$. Since red dots represent negative values, $2 + (-5) = -3$.

Answer:

$1$