Common Core: 1st Grade Math : Adding and Subtracting Within 20
Study concepts, example questions & explanations for Common Core: 1st Grade Math
All Common Core: 1st Grade Math Resources
Example Questions
Example Question #826 : Operations & Algebraic Thinking
There are two after school programs at Steve’s school. One program has 
This is an addition problem because we want to know how many total sutents are in the after school programs when we put the two programs together. When we put things together we are adding.
We can start at 
Example Question #11 : Addition Within 20 To Solve Word Problems
Drew has homework in his English class and his science class. He has 
This is an addition problem because we want to know how many total chapter he has to read when we put the English and the science chapters together. When we put things together we are adding.
We can start at 
Example Question #828 : Operations & Algebraic Thinking
There are 
This is an addition problem because we want to know how many total students there are when we put the boys and the girls together. When we put things together we are adding.
We can start at 
Example Question #21 : Addition Within 20 To Solve Word Problems
For the school play, there are 
This is an addition problem because we want to know how many total parts there are when we put the singing and the talking parts together. When we put things together we are adding.
We can start at 
Example Question #22 : Addition Within 20 To Solve Word Problems
We ordered a large pizza and a medium pizza. The large pizza has 
This is an addition problem because we want to know how many total slices of pizza we have when we put the medium pizza slices together with the large pizza slices. When we put things together we are adding.
We can start at 
Example Question #833 : Operations & Algebraic Thinking
The pet store has 
This is an addition problem because we are putting the frogs in the two tanks together. When we put things together we are adding.
We can start at 
Example Question #431 : Adding And Subtracting Within 20
Tim’s favorite tree had 
This is a subtraction problem because the tree lost branches, so it will have less than what it started with.
We can start at 
Example Question #322 : Operations
Megan has 
This is a subtraction problem because Megan is giving some of her markers away, so she will have less than what she started with.
We can start at 
Example Question #322 : Operations
The toy panda weighs 
This is a subtraction problem because we are finding the difference in weight between the truck and the panda.
We can start at 
Example Question #324 : Operations
Jess has 
This is a subtraction problem because Jess has worn some of her shirts, so her total number of shirts in the drawer is decreasing.
We can start at 
All Common Core: 1st Grade Math Resources
