Wednesday, October 13, 2010

5-6 Multiplication and Division Expressions

Make sure you know your multiplication facts!

For #1-9, Remember that j = 12 and k = 6

#1) j / 3 ___
We know that j = 12, so we will now solve 12 / 3. Sing or count by 3's until you get to 12.
3, 6, 9, 12. That took us four times to get to 12. So the answer to j / 3 is 12

#4) 5 x k
We know that k = 6, so we will no solve 5 x 6. Count by 5's until you get to your fifth finger.
5, 10, 15, 20, 25, 30. The answer to 5 x k = 30

#7) 5 x (j /4)
We know that j = 12. We know to always do what is inside parenthesis first. So let's solve j/4, or 12/4. Sing or count by 4's until you get to 12.
4, 8, 12. We now see that 12/4 =3.
Now for the second step. Bring down 5 x, to make 5 x 3.
This should be fairly easy. 5 x 3 = 15

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