Adding and Subtracting Base Tens

How many?

• 50

• 45

• 41

• 55

How many?

• 11

• 1

• 2

• 22

How many in all?

• 8

• 70

• 87

We can use base ten blocks, place value chips, and place value charts to add and subtract problems within 100.

• True

• False

Using base ten blocks, how would I represent this math problem: 100-60=?

• 3 tens

• 2 tens and 15 little cubes

• 4 tens

Using base ten blocks, how would I represent this math problem: 20+35=

• 5 tens and 5 little cubes

• 4 tens and 5 little cubes

• 4 tens and 15 little cubes

Using value chips, how would I represent this math problem: 37+5=?

• 4 tens and 5 ones

• 4 tens and 3 ones

• 4 tens and 2 ones

Using value chips, how would I represent this math problem: 88-14=?

• 6 tens and 5 ones

• 7 tens and 4 ones

• 7 tens and 2 ones

John has 25 stickers. He gives 13 stickers to Sarah. How many stickers does John have left?

• 12: 1 ten and 2 ones

• 38: 20 tens and 18 ones

• 13: 13 ones

Angela has 88 stickers. Lauren has 7 stickers. How many stickers do they have altogether?

• 81: 7 tens and 11 little cubes

• 92: 9 tens and 2 little cubes

• 95: 9 tens and 5 little cubes