Lesson Worksheet: Adding Three Numbers Mathematics • 1st Grade
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:
Find the missing number in .
Using that , what is ?
Q5:
Find the missing number in .
Q6:
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?
Q7:
Scarlett has 20 counters.
Use the counters to find the missing number.
Q8:
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?
Q9:
Am I using the equal sign correctly? Check if the two sums are equal.
- AYes
- BNo
Q10:
Am I using the equal sign correctly? Check if the two sums are equal.
- ANo
- BYes
Practice Means Progress
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