In this worksheet, we will practice adding three 1-digit numbers by adding in any order and using strategies like making ten or using doubles.

Q1:

Complete the following: .

Q2:

Find the three numbers from 4, 1, 7, 9, and 2 whose sum is 10.

• A7, 2, 1
• B4, 2, 1
• C4, 2, 9
• D7, 2, 9

Q3:

.

Q4:

Jennifer was cleaning out her closet. She had 6 shirts, some dresses, and 4 pairs of pants.

If she had 13 pieces of clothing altogether, which of the following is the correct addition sentence?

• A • B How many dresses did she have?

Q5:

There are 9 baskets with 10 apples in each and 5 more apples in a tree. How many apples are there all together?

Q6:

Complete the following: .

Q7:

Find the missing number in .

Using that , what is ?

Q8:

Benjamin had 5 chocolate bars, 4 lollipops, and 3 gummy bears. Find another way to write the total number of candies.

• A
• B
• C
• D
• E

Q9:

Find the missing number in .

Q10:

We will see how we can write in different ways.

Find the missing number. Find the missing number. Complete the missing sum. • A7, 3
• B7, 6
• C4, 9
• D11, 3
• E4, 8

All of these sums are equal. What are they equal to? Q11:

Hannah has 20 counters. Use the counters to find the missing number. Q12:

When we add three numbers, we can first add any two of them.

For example, to find , we could first add 8 and 6 to get 14 as the picture shows. Now, can you find the missing number? Q13:

Am I using the equal sign correctly? Check if the two sums are equal. • Ayes
• Bno

Q14:

Am I using the equal sign correctly? Check if the two sums are equal. • Ano
• Byes

Q15:

Is the equal sign used correctly? Check if the two sums are equal. • ANo
• BYes

Q16:

Complete the following: .

Q17:

Check if the equal sign has been used correctly in . Are the two sums equal?

• ANo
• BYes