Powerpoint on how to do multiplication

1. Multiplication

2. Definition
Basic idea of multiplication is
repeated addition
Example:
4 x 3 = 4+4+4 = 12

3. 4 x 4= 16
How many How many How many
groups in each all
group together
Times Equals

4. Story Problem
Sally and John are on an apple
orchard picking apples for a picnic.
They have 4 baskets with 4 apples in
each. How many apples do they have
all together?

5. Another way to look at
it…
1x2 = 2x1
3x4 = 4x3
5x2 = 2x5
* Order doesn’t matter

6. Any number multiplied by 1,
is itself
1x1 = 1
2x1 = 2
3x1 = 3
4x1 = 4
5x1 = 5

7. x2
1x2 = 1+1 = 2
2x2 = 2+2 = 4
3x2 = 3+3 = 6
4x2 = 4+4 = 8
5x2 = 5+5 = 10

8. x3
1x3 = 1+1+1 = 3
2x3 = 2+2+2 = 6
3x3 = 3+3+3 = 9
4x3 = 4+4+4 = 12
5x3 = 5+5+5 = 15

9. x4
1x4 = 1+1+1+1 = 4
2x4 = 2+2+2+2 = 8
3x4 = 3+3+3+3 = 12
4x4 = 4+4+4+4 = 16
5x4 = 5+5+5+5 = 20

10. x5
1x5 = 1+1+1+1+1 = 5
2x5 = 2+2+2+2+2 = 10
3x5 = 3+3+3+3+3 = 15
4x5 = 4+4+4+4+4 = 20
5x5 = 5+5+5+5+5 = 25

11. Multiplication Table

12. References
Slide 1: picture of the “x”
http://www.clker.com/cliparts/u/k/c/T/g/Q/multiplication-sig-md.png
Slide 2: definition of multiplication,
www.mathisfun.com/definitions/multiplication.html
Slide 3: another definition, www.brighthubeducation.com/lesson-
plans-grades-3-5/33932-teaching-multiplication-facts-how-to-use-
multiplication-patterns/
Slide 4: picture of green apple,
http://news.techworld.com/operating-systems/3244738/apple-
revenue-top-20-billion-in-fiscal-fourth-quarter/
Slide 5: picture of “x”,
http://www.oocities.org/sueamorris/images/Multiplication.jpg
Slide 7: picture of 2x2 on book,
http://www.leewardlaw.com/mathpics/2x2.jpg
Slide 9: picture of 3x4,
www.netrover.com/~kingskid/Math/multdivmain.htm
Slide 11: http://www.instructables.com/id/Multiplication-Tables/