Videos and songs to help Grade 1 kids learn how to determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _.
Common Core: 1.OA.8
- I can determine the unknown value in an addition or subtraction equation when two out of three numbers in the equation are given.
More Lessons for Grade 1
Common Core for Grade 1
The Mystery of the Missing Addends
A fun story to help kids learn how to find missing addends using part part whole
3 + ? = 7
Solving addition and subtraction fact families when all three numbers are given and when there is a missing number.
4 + ? = 7
? + 5 = 7
Missing Addend using Tens Frame
Using the tens frame to solve missing addend problems.
Find the Missing Number (1.OA.8).
Subtraction and Missing Addend
I have 5 pencils. Josh has 2 pencils.
How many more pencils does Josh need to have the same number of pencils as me?
An item costs $7. I have $3. How many more dollars do I need to but the item?
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