# Lesson Worksheet: Ten More and Ten Less: Numbers up to 100 Mathematics • 1st Grade

In this worksheet, we will practice finding ten more or ten less than any number up to 100 and investigating how the number of tens and the number of ones change.

Q1:

Find 10 more than 20. Use the base ten blocks to help you. Q2:

Find the two-digit number and then find 10 more.

Which picture shows 26?

• A • B • C Now, find 10 more than 26.

Q3:

We can use number bonds to ten to help us find 10 more than any tens number. If we know that , we also know that .

We have just made the numbers bigger by 10. Q4:

Jacob writes the number 87 on his chart. If he finds 10 less, what will happen in each column?

• AThe ones will go down by 1. The tens will stay the same.
• BThe tens will go down by 1. The ones will stay the same.

Now, find 10 less than 87. What will the new number be?

Q5:

Find 10 more than 37.

Q6:

Find 10 more than 89: .

Q7:

Find 10 less than 50. Use the base ten blocks to help you. Q8:

Find the picture that shows 10 less than 38.

• A • B • C Q9:

Fill in the blank: .

Q10:

Fill in the blank: .

Q11:

What number is missing?

Q12:

We want to show that 10 more than 59 is 69.

How many more ten rods should we add to the picture? Q13:

We can use number bonds to ten to help us find 10 more than any tens number. If we know that , we also know that .

We have just made the numbers 10 times bigger.

Q14:

Elizabeth writes the number 63 on her chart. If she adds 10 more, what will happen in each column?

• AThe ones will go up by 1. The tens will stay the same.
• BThe tens will go up by 1. The ones will stay the same.

Now, add 10 more to 63. What will the new number be?

Q15:

We want to show that 10 less than 34 is 24.

How many ten rods should we take away to show this? Q16:

49 is 10 less than .

Q17:

Find the missing label.

Number10 More
31323
• A10 More
• B10
• C10 Less

Q18:

Which number is NOT 10 less than 65?

• A55
• B75

Q19:

Which number is NOT 10 more than 32?

• A22
• B42

Q20:

Let us think about finding 10 less.

Which picture shows 37?

• A • B • C Now, find 10 less than 37.

Q21:

Mia has 20 beads. She wants to add on 10 more. How many will she have altogether? Q22:

Find the missing label.

10 LessNumber
192939
• A10 Less
• B10
• C10 More

Q23:

94 is ten more than .

Q24:

Ten more than 29 is .

Q25:

Ten less than 85 is .