#### Transcript of Multiplication and Division

Multiplication is repeated addition. For example... 4x6 is just like 6+6+6+6. Another example... is 7x2 is just like 2+2+2+2+2+2+2 or 2x7 is 7+7.

Multiplication

This is a way you would use for higher numbers.

The Box

This way is easy but not as fast.

Break Apart

5's and 10's are really easy numbers to multiply with

For 9's, just times the number by 10 and subtract the number that you multiplied with, like if the question 5x9 you would figure it out by 5x10=50 and 50-5=45 so 5x9=45

And you can multiply in groups like 5x9 is 5, 10, 15,20, 25, 30, 30, 35, 40, 45

Easy ways to Multiply

Division is repeated subtraction. For example... 15-5 is like 15-5-5-5. Another example is 56-7 is just like 56-7-7-7-7-7-7-7-7.

**Division**

This strategy is good for a lot of different types of division.

Hang Man

This way is really easy for small numbers.

Multiplication

Easy Ways to Divide

**By: Ben & Nathan**

371x629=______

300 70 1

600

20

9

3x6=18

18 add 4 0's

=222,600

=7,420

=3,339

180000

42000

600

6000

1400

20

9

2700

630

222,600

7,420

3,339

233,359

233,359

349x724=______

300x700=210000

300x20=6000

300x4=1200

40x700=28000

40x20=800

40x4=160

9x700=6300

9x20=180

9x4=36

210000

6000

1200

28000

800

160

6300

180

36

252,676

252,676

3x7=21

2 add 2 0's

Conclusion

We hope we have taught you something that will work and help you be more accurate and efficient.

Thank

You!

518-39=___

:

39

518

39x10=390

10

-390

128

39x3=117

-117

11

3

10+3=13

so the answer is 13

with a remainder

of 11.

13

R11

13

R11

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72-18=_

:

18x_=72

18, 36, 54,72

1 2 3 4

4

4

You can also divide in groups just like multiplication if the question is 9-3 it would be 9-3-3-3

Multiples 2 and 5 are really easy numbers to divide like 12-2=6

Dividing by tens is as easy as moving the decimal point left we know it seems like 100 does not have a decimal point but it does (100.0) so 100.0-10=10.00

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**Multiplication and Division**

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