**Adding 3 or more numbers worksheet :**

Worksheet on adding 3 or more numbers is much useful to the students who would like to practice problems on adding 3 more numbers with different signs.

1. Add : -1.5 + 3.5 + 2

2. Add : 5 + (-3) + 7

3. Tina spent $5.25 on craft supplies to make friendship bracelets. She made $6.75 and spent an additional $3.25 for supplies on Monday. On Tuesday, she sold an additional $4.50 worth of bracelets. What was Tina’s overall profit or loss ?

**Problem 1 : **

Add : -1.5 + 3.5 + 2

**Solution : **

**Step 1 : **

According to the associative property of addition, we can add any two numbers among the given three numbers.

Then, we have

-1.5 + 3.5 + 2 = (-1.5 + 3.5) + 2 ------(1)

**Step 2 : **

In (-1.5 + 3.5), the two numbers have different signs.

So, find the absolute difference of them without the actual signs.

|1.5 - 3.5| = |-2| = 2

**Step 3 : **

In the two numbers 1.5 and 3.5, the sign of the bigger number is positive. So, we have to take positive sign to the result.

(1) -----> -1.5 + 3.5 + 2 = (+2) + 2

-1.5 + 3.5 + 2 = 4

**Problem 2 : **

Add : 5 + (-3) + 7

**Solution : **

**Step 1 :**

According to the associative property of addition, we can add any two numbers among the given three numbers.

Then, we have

5 + (-3) + 7 = [(5 + (-3)] + 2 ------(1)

**Step 2 : **

In [(5 + (-3)], the two numbers have different signs.

So, find the absolute difference of them without the actual signs.

|5 - 3| = |2| = 2

**Step 3 : **

In the two numbers 5 and 3, the sign of the bigger number is positive. So, we have to take positive sign to the result.

(1) -----> 5 + (-3) + 7 = [+2] + 2

5 + (-3) + 7 = 4

**Problem 3 : **

Tina spent $5.25 on craft supplies to make friendship bracelets. She made $6.75 and spent an additional $3.25 for supplies on Monday. On Tuesday, she sold an additional $4.50 worth of bracelets. What was Tina’s overall profit or loss?

**Solution : **

**Step 1 :**

Use negative numbers to represent the amount Tina spent and positive numbers to represent the money Tina earned.

**Step 2 : **

Find -5.25 + 6.75 + (-3.25) + 4.50.

**Step 3 : **

Group numbers with the same sign.

-5.25 + (-3.25) + 6.75 + 4.50 ----> Commutative property

(-5.25 + (-3.25)) + (6.75 + 4.50) ----> Associative property

**Step 4 : **

Add the numbers inside the parentheses.

-8.50 + 11.25

Find the difference of the absolute values :

|11.25 - 8.50| = |2.75| = 2.75

In 8.50 and 11.25, the sign of the greater number is positive. So, the result also must be positive and it is 2.75.

Hence, Tina earned a profit of $2.75.

After having gone through the stuff given above, we hope that the students would have understood "Adding 3 or more numbers worksheet".

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