Fluently Adding and Subtracting Within 100

Front

What is 100 - 60?

Back

40

Front

Subtraction is the 'undoing' of which operation?

Back

Addition

Front

In the number 42, what place value does the 4 represent?

Back

Tens

Front

What is the biggest place value you can add the ones place digits together without going over 10 in 37 + 25?

Back

Tens place

Front

If John has 25 stickers and gives 13 to Sarah, how many does he have left?

Back

12: 1 ten and 2 ones

Front

What do we call the blocks used to represent numbers in base ten?

Back

Base ten blocks

Front

What is the sum of 37 and 25?

Back

62

Front

What is the difference between 80 and 45?

Back

35

Front

If you have 3 tens and 5 ones, what number do you have?

Back

35

Front

What is 50 - 20?

Back

30