Subtract
Multiples of 10
Name
Chapter 11, Lesson 1B
Objective: To subtract multiples of ten using the relationship
between addition and subtraction
Mrs. Kim brings 50 apples to the school
picnic. The children eat 30 apples.
How many apples are left?
Subtract: 50 2 30 5 ?
Think
50
230
?
20
130
50
50
230
20
? 1 30 5 50
20 1 30 5 50
So, 50 2 30 5 20.
Copyright © by William H. Sadlier, Inc. All rights reserved.
There are 20 apples left.
Use addition to find the difference.
Write the addition you use. Then write the difference.
1. 80 2
20 5 ?
60 1 20 5     
80
60
80 2 20 5     
3.
50
50
210
210 1
?
2.
4.
90 2 50 5
     1      5
90 2 50 5
60 2 40 1
?
?
    
    
60
2 40
5. What addition sentence can you use
to find 80  70? Why?
Grade 1, Lesson 11-1B 227
5101-1_WB01_227 227
1/16/13 3:41 PM
Name
Use addition to find the difference.
Write the addition you use. Then write the difference.
0 2 40 5 5
1 5  
 
7.
60 2 20 5 1 5 9.
80 2 30 5 1 5 11.
70 2 50 5 1 5 8.
10.
70
230
12.
13.
1
80
210
90 2 60 5 1 5 40 2 40 5 1 5 14. 90
1
270
1
Solve. Use a strategy.
15. Sam had 90 hats to sell.
16. James bakes 80 muffins.
He sold some hats. Now
He bakes 10 more muffins
he has 40 hats. How many
than June. How many
hats did Sam sell?
muffins did June bake?
hats
muffins
Test Preparation
17. What is the difference?
Write an addition sentence you
can use to find the difference.
228 Grade 1, Lesson 11-1B
5101-1_WB01_228 228
Copyright © by William H. Sadlier, Inc. All rights reserved.
6.
80 2 60 5
1
5
For additional Practice, go to page 262 in this Workbook.
Then go to Lesson 11-2, pages 505–506 in the Student Book.
1/16/13 3:41 PM