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Anyone have any tricks or tips on teaching multiplication tables and renaming in subtraction? My girls are struggling with these.
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heres some
The 9 Times Quickie
1. Hold your hands in front of you with your fingers spread out.
2. For 9 X 3 bend your third finger down. (9 X 4 would be the fourth finger etc.)
3. You have 2 fingers in front of the bent finger and 7 after the bent finger.
4. Thus the answer must be 27.
5. This technique works for the 9 times tables up to 10.The 4 Times Quickie
1. If you know how to double a number, this one is easy.
2. Simply, double a number and then double it again!The 11 Times Rule #1
1. Take any number to 10 and multiply it by 11.
2. Multiply 11 by 3 to get 33, multiply 11 by 4 to get 44. Each number to 10 is just duplicated.The 11 Times Rule #2
1. Use this strategy for two digit numbers only.
2. Multiply 11 by 18. Jot down 1 and 8 with a space between it. 1 8.
3. Add the 8 and the 1 and put that number in the middle: 198Deck 'Em!
1. Use a deck of playing cards for a game of Multiplication War.
2. Initially, children may need the grid (below) to become quick at the answers.
3. Flip over the cards as though you are playing Snap.
4. The first one to say the fact based on the cards turned over (a four and a five = Say "20") gets the cards.
5. The person to get all of the cards wins!
6. Children learn their facts much more quickly when playing this game on a regular basis.Seeing the Patterns
1. Use a multiplication grid or let your students/children create one.
2. Look carefully at all of the patterns, especially when the numbers correspond with the facts e.g., 7X8 and 8X7 = 56
3. Let students/children practice the 'fast adding' which is what multiplication is.
4. When students can count by 3s, 4s, 5s 6s, etc. they will automatically know their multiplication tables. 
also we play a game where we have to turn over matching answers to times tables or subtraction problems, kids get prizes
this might be the same as above but better said!
http://www.mathsisfun.com/multiplicationtipstricks.html
heres a site i used for subtraction help http://www.ricksmath.com/subtips.html

Here's a trick for the 9s. Hold both hands palms down with fingers spread apart. Always start with pinky on left hand. Lets try 9x4. Count over to 4 and put that finger down(index finger) the fingers to the left are the 10s (so 30), the fingers to the right of the one put down are the ones (so 6). Answer is 36.
9x8= count over 8 ( should be on middle finger on right hand) so 7 tens and 2 ones, answer is 72:) hope that makes sense. That helped my 4th graders 
I think that one will help us for sure! It even has a link for worksheet and tests. This is great! Thanks.
Quoting oredeb:
also we play a game where we have to turn over matching answers to times tables or subtraction problems, kids get prizes
this might be the same as above but better said!
http://www.mathsisfun.com/multiplicationtipstricks.html
heres a site i used for subtraction help http://www.ricksmath.com/subtips.html