2.OA.1 bellringer/DG

Front

What is an addition keyword?

Back

An addition keyword is a word that indicates you need to add numbers together. Examples include 'sum' and 'more.'

Front

What does 'sum' mean in math?

Back

The 'sum' is the result of adding two or more numbers together.

Front

If Ben had 3 grapefruits and Owen gave him 7 more, how many grapefruits does Ben have now?

Back

10 grapefruits

Front

If Jason had 4 marbles and found 9 more, how many marbles does he have now?

Back

13 marbles

Front

What is subtraction?

Back

Subtraction is taking one number away from another. It is the opposite of addition.

Front

What does 'difference' mean in math?

Back

The 'difference' is the result of subtracting one number from another.

Front

If there are 10 boys and 5 girls in a class, how many children are there in total?

Back

15 children

Front

If 8 children leave a class of 15, how many children are left?

Back

7 children

Front

Sophie had 15 crayons and gave 5 to Caleb. How many crayons does she have now?

Back

10 crayons

Front

What is the equation for adding two numbers?

Back

The equation is written as: a + b = c, where a and b are the numbers being added, and c is the sum.