Common Core: 1st Grade Math : Representing and Solving Addition and Subtraction Problems

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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Example Questions

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Example Question #13 : Word Problems: Addition Of Three Whole Numbers Whose Sum Is 20 Or Less: Ccss.Math.Content.1.Oa.A.2

Joe spent  minutes cleaning his room,  minutes cleaning his bathroom, and  minutes helping his mom clean the kitchen. How much time did Joe spend cleaning? 

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many total minutes Joe spent cleaning altogether. When we put things together we are adding. 

We can start at  and count up .

Then we can count up .

Example Question #21 : Representing And Solving Addition And Subtraction Problems

At school we had a hotdog-eating contest. I ate  hotdogs, Mel ate  hotdogs, and Eric ate  hotdogs. How many total hotdogs did we eat? 

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many hotdogs we ate altogether. When we put things together we are adding. 

We can start at  and count up .

Then we can count up .

Example Question #21 : Representing And Solving Addition And Subtraction Problems

At the cakewalk there are  chocolate cakes,  yellow cakes, and  white cakes. How many total cakes are there? 

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many cakes are at the cake walk altogether. When we put things together we are adding. 

We can start at  and count up .

Then we can count up .

Example Question #23 : Word Problems: Addition Of Three Whole Numbers Whose Sum Is 20 Or Less: Ccss.Math.Content.1.Oa.A.2

At Linda’s birthday party there were  peperoni pizzas,  sausage pizzas, and  cheese pizzas. How many total pizzas were there? 

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many total pizzas we have when we put the pizzas altogether. When we put things together we are adding. 

We can start at  and count up .

Then we can count up .

Example Question #24 : Word Problems: Addition Of Three Whole Numbers Whose Sum Is 20 Or Less: Ccss.Math.Content.1.Oa.A.2

Lauren has  pencils,  markers, and  notebooks in her backpack. How many total items does Lauren have in her backpack? 

Possible Answers:

Correct answer:

Explanation:

This is an addition problem because we want to know how many total supplies Lauren has in her backpack when we put everything together. When we put things together we are adding. 

We can start at  and count up .

Then we can count up .

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