Math grade 8 review of Computational Skills
Adding and subtracting Whole numbers
Multiplication and division
Strategies that work Rules for multiplication 0 rule – answer is zero 1 rule – answer is the other number 2 rule-- doubles 4rule- Timmy’s special (double double) 5 rule – odds and evens 6 rule – triple play 9 rule – power fingers
2 and 3 digit multiplication Prove the answer.... 0
Why the “O”?...........
45240
Division....... Steps of divisionDMSCB • Does – How many times does
this number DIVIDE into that number
• McDonalds – MULTIPLY that number by the divisor.
• Sell – SUBTRACT the answer from the number in the divisor.
• Cheese- CHECK to see if it is correct.
• Burgers – BRING DOWN another number.
Prove this......