Kimberly Koss

1
Math is Fun!

• Kimberly Koss
• A math lesson prepared for
• 2nd graders.

2
Learning Addition and Subtraction

• Knowing addition and subtraction will help you to
  solve more math problems as you get older.
• In this lesson we will be working with addition
  and subtraction problems.
• After you have completed this lesson, you will be
  able to do addition and subtraction in different
  ways.
• You will also be able to show your friends how to
  do any type of addition or subtraction.

3
What You Need To Do

• The next slides will teach you mini lessons in
  addition and subtraction.
• Following each mini lesson, there will be math
  problems for you to work on.
• Print out the answer sheet on the next slide
• Use this sheet to write your answers to the math
  problems that follow the lessons.
• Go here to practice your math skills before
  starting this lesson http//education.jlab.org/s
  madd/

4
Answer Sheet
Click here to read the directions again

5
Addition

• Addition is easy and is fun to do when you know
  how to add numbers.

• Watch how this problem is done!
• 2 3 5

Blue says addition is fun!!
6
Now Try These Problems(Use Answer Sheet)

• 4
• 5

10 16
22 10
15 9
7
Partial Sums Addition

• 769
• 288

9 8 17
700 200 900
60 80 140



1057

• Break each number into groups of hundreds, tens,
  and ones.
• Add up each problem and then add the answers to
  each group to get the final answer.

8
Now Try These Problems(Use the answer sheet)

• 21
• 5

• 17
• 6

13 4
10 12
9
Subtraction

• Subtraction is easy and is fun to do when you
  know how to add numbers.

3 - 2 1
-

10
Now Try These Problems(Use the answer sheet)

• 27
• -12

18 - 4
20 - 9

• 23
• -15

11
Practice Problems

• 33
• -11

• 24
• 15

30 -24
294 193
Now its quiz time! Good Luck!
12
Quiz

• Print this page out, solve the problems and then
  check the next slide for the answers

• Try these Subtraction Problems
• 21 15 33
• - 6 - 4 -12

• Try these Addition Problems
• 568 27 954
• 452 13 186

13
Answer Key
Click here to try the lesson again

• Try these Subtraction Problems
• 21 15 33
• - 6 - 4 -12
• 15 11 21

• Try these Addition Problems
• 568 27 954
• 452 13 186
• 1020 40 1140

14
References
The pictures in this lesson came from
http//www.dltk-kids.com/crafts/cartoons/zoo.html