Math Facts Speed Round
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What you will learn
- 1Recall multiplication and division facts fluently
- 2Apply mental math strategies for quick calculation
- 3Demonstrate accuracy and speed with basic math facts
Mini Lesson
Math facts are basic number combinations you should know from memory. The faster and more accurately you recall them, the easier all other math becomes.
Multiplication Tables 1–12
- Practice your multiplication tables 1–12 until recall is instant.
- Helpful patterns: any number × 0 = 0; any number × 1 = itself; any number × 10 = add a zero.
- The commutative law means 6 × 7 = 7 × 6, so learning one fact gives you two.
Division as the Inverse of Multiplication
- Division facts are the inverse of multiplication facts: the quotient is the missing factor.
- If 6 × 7 = 42, then 42 ÷ 7 = 6 and 42 ÷ 6 = 7.
- Every multiplication fact belongs to a fact family of four related facts.
Words to know
fact family
A group of related multiplication and division facts using the same three numbers.
e.g. 6, 7, 42: 6×7=42, 7×6=42, 42÷6=7, 42÷7=6.
product
The result of multiplying two or more numbers.
e.g. The product of 7 and 8 is 56.
quotient
The result of dividing one number by another.
e.g. 63 ÷ 9 = 7, so the quotient is 7.
commutative law
A rule that says order does not change the product: a × b = b × a.
e.g. 6 × 4 = 24 and 4 × 6 = 24.
mental math
Calculating in your head without writing or using a tool.
e.g. For 9 × 6, think 10 × 6 - 6 = 54.
Tip: when you are unsure of a fact, use a near-fact you know and adjust. For 7 × 8, think 7 × 7 = 49, then add 7 to get 56.
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