Adding 10 and 100 to a Given Number

Math: Counting by 10's and 100's

Lesson Target:

Learning target:

• I can identify 10 more ,10 less, 100 more, or 100 less than a given number. 

• I can add and subtract 10 or 100 from a three-digit number.

Build Understanding

There are 430 cartons of milk. 10 cartons of milk are sold. How many cartons of milk are there now?

What do you need to find?

Make a place value chart and write the number 430 in the chart.

Solve. There are cartons of milk in the

store now.

Multiple Choice

How can you show 10 more

than 430?

• 440

• You can draw it.

  4 flats and 3 longs

Multiple Choice

What is the number that is

100 less than 430.

• 230

• 330

Multiple Choice

What is the number that is

100 more than 430.

• 530

• 440

• 230

Multiple Choice

Madeline has 671 stamps. She gets 10 stamps.

Which digit will change?

Write the number of stamps she has now.

• The digit in the tens place will change. She has 681 stamps.

• The digit in the ones place will change. She has 672 stamps.

Multiple Choice

Madeline gets 100 stamps as a gift.

Write the number of stamps she has now.

• 781

• 701

Multiple Choice

Madeline gives 10 stamps to her brother.

Write the number of stamps she has now.

• 761

• 771

Multiple Choice

Madeline gives 100 stamps to a friend.

Write the number of stamps she has now.

• 681

• 671

Multiple Choice

Exit Ticket

Mr. Baum bakes 135 cookies for the bake sale.

The first customer buys 10 cookies. How many

cookies are there now? Write the number.

• Ms. Baum has 130 cookies.

• Ms. Baum has 125 cookies.