Question

use the addition table.

1. circle two squares that each represent a sum of 3 and 4. this shows the commutative property of addition.

3 + 4 = 7 and 4 + 3 = 7

1. circle the two addends which make a sum of the shaded 12. write the number sentence.
2. shade a diagonal of numbers green that show the sums equal to 9.
3. shade a row of numbers yellow that represents sums with one addend of 10.

problem solving
mathematical

1. practice justify conclusions jasmine had friends over at her house. every time the doorbell rang, 2 more arrived. the doorbell rang 3 times. how many friends does jasmine have over altogether?
2. steve colors the following sums on an addition table. if he continues the pattern, will the numbers continue

Explanation:

Step1: Analyze question 4

Find pairs in table that sum to 12.

Step2: Locate pairs

From the table, $2 + 10=12$, $3 + 9 = 12$, $4+8 = 12$, $5 + 7=12$, $6+6 = 12$.

Step3: Analyze question 5

Find diagonal with sums of 9.

Step4: Identify diagonal

The pairs are $0 + 9$, $1+8$, $2 + 7$, $3+6$, $4 + 5$.

Step5: Analyze question 6

Find row with one addend as 10.

Step6: Locate row

The row with 10 as an addend is the row labeled 10.

Step7: Analyze question 7

Use multiplication for the problem.

Step8: Calculate total friends

Since 2 friends arrive each time and door - bell rings 3 times, the total number of friends is $2\times3=6$.

Answer:

1. Examples of number sentences: $2 + 10=12$, $3 + 9 = 12$, $4+8 = 12$, $5 + 7=12$, $6+6 = 12$ (any one is correct).
2. Shade the pairs $0 + 9$, $1+8$, $2 + 7$, $3+6$, $4 + 5$ diagonally.
3. Shade the row labeled 10.
4. 6