Eight Simple Rules for Memorizing Multiplication Tables

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## Eight Simple Rules for Memorizing Multiplication Tables

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**Eight Simple Rules for Memorizing Multiplication Tables**Your task: Take a clean multiplication table grid. As we go through each rule, color in problems that go with each rule using a different color. See how many problems are left blank are then end. These are the only problems your really need to memorize.**First Number Times Second Number is the Same as Second**Number Times First Number • (also known as Commutative Property) • 2 x 3 = 3 x 2 • 4 x 6 = 6 x 4 • 7 x 8 = 8 x 7 • 9 x 5 = 5 x 9 Rule 1**Any Number Times One is that Number.**• 2 x 1 = 2 • 3 x 1 = 3 • 4 x 1 = 4 • 5 x 1 = 5 • Ect….. Rule 2**To Multiply by Ten, Attach a Zero.**• 1 x 10 = 100 • 2 x 10 = 200 • 3 x 10 = 300 • 4 x 10 = 400 • 5 x 10 = 500 • 6 x 10 = 600 Rule 3**To Multiply by Two, Double the Number**• 2 x 2 = 2 + 2 • 4 • 3 x 2 = 3 + 3 • 6 • 5 x 2 = 5 + 5 • 10 • 7 x 2 = 7 + 7 • 14 • 9 x 2 = 9 + 9 • 18 • 12 x 2 = 12 + 12 • 24 Rule 4**Multiplying by Four is Doubling Twice**• (Double-Double Rule) • 4 x 2= • 4 + 4 and 4 + 4 = 16 • 4 x 6 = • 6 + 6 and 6 + 6 = 24 • 4 x 3 = • 3 + 3 and 3 + 3 = 12 • 4 x 8 = • 8 + 8 and 8 + 8 = 32 Rule 5**Multiplying by Five is Just Counting by Fives**• 1 x 5 = 5 • 2 x 5 = 10 • 3 x 5 = 15 • 4 x 5 = 20 • 5 x 5 = 25 • 6 x 5 = 30 • 7 x 5 = 35 • 8 x 5 = 40 • etc Rule 6**The Nine Rule – Tens Place is Number Minus One, Ones Place**is Nine Minus Tens • Does anyone know any other patterns for learning nines? Rule 7**Now that you have colored all the “rules” in, how many**blank problem are left? • Since there are patterns to help you remember all the other multiplication facts, these are the only problems you really need to memorize. Check your grid…now the last rule**Memorize the ten remaining facts**• 3 x 3 = 9 • 3 x 6 = 18 • 3 x 7 = 21 • 3 x 8 = 24 • 6 x 6 = 36 • 6 x 7 = 42 • 6 x 8 = 48 • 7 x 7 = 49 • 7 x 8 = 56 • 8 x 8 = 64 Rule 8