2 Digit addition and Subtraction

Front

Do you need to make a ten to solve?

Back

Yes, sometimes you need to make a ten to help with addition or subtraction.

Front

What is the mistake? Did not subtract the 4 tens, Did not take out a ten, Did not subtract the ones

Back

The mistake is: Did not subtract the 4 tens.

Front

28 + 33 = ____

Back

61

Front

Solve this problem: 89 - 25 = ____

Back

64

Front

There are 45 gorillas in Ivan's troupe. Then 51 other gorillas join them. How many total gorillas are there?

Back

96

Front

What is addition?

Back

Addition is combining two or more numbers to get a total.

Front

What is subtraction?

Back

Subtraction is taking one number away from another.

Front

What does it mean to regroup in addition?

Back

Regrouping means to make a ten when adding numbers.

Front

What does it mean to borrow in subtraction?

Back

Borrowing means taking a ten from the next place value when subtracting.

Front

If you have 10 and you add 5, what do you get?

Back

You get 15.