Division review
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Division review Division review Presentation Transcript

  • Division A Quick Review!
  • Vocabulary Quotient: the answer to a division problem Dividend: the 4 number being divided 9 36 Divisor: thenumber that divides the dividend The problem shown above can also be written like this: 36 ÷ 9 = 4
  • 48 ÷ 6 = 8Which number is the dividend?Which number is the quotient?
  • 11 12 132Which number is the divisor?Which number is the quotient?
  • Division• When dividing, think sharing equally.• Let’s try dividing by placing the same number of items in groups.• Grab your goldfish crackers...
  • Let’s say you have 15 goldfish crackers. You want to share these crackers with 3 friends. Each friend needs to have the same number of crackers. How many will each get? Friend 1 Friend 2 Friend 3
  • Let’s say you have 15 goldfish crackers. You want to share these crackers with 3 friends. Each friend needs to have the same number of crackers. How many will each get? Friend 1 Friend 2 Friend 3 Each friend gets 5 crackers with none leftover.
  • Let’s try another exampleJayne wants to share her 19 crackers with 4friends. If each friend gets the same number of crackers, how many will each get?
  • Jayne wants to share her 19 crackers with 4 friends. If each friend gets the same number of crackers, how many will each get?Friend 1 Friend 2 Friend 3 Friend 4 4r3 4 19 Each friend gets 4 crackers. In this case, there will be 3 crackers left over. This number, 3, is the remainder.
  • Another Division StrategyYou probably remember that multiplication is repeated addition. Division can also be thought of as repeated subtraction!
  • 18 ÷ 3 1. Whatever the dividend is, keepsubtracting the divisor until you get to 0 or an answer that is less than your divisor.2. The amount of times you subtracted is your quotient or your answer!! Yeah!!
  • 18 ÷ 3 1. Start with 18 goldfish crackers.2. How many times did you subtract 3?
  • 18 Repeated -3 1 To get the answer, count the number of times youSubtraction 15 subtracted 3. -3 2 12 -3 3Keep subtracting 3 until you reach zero! 9 -3 4 6 -3 5 3 -3 6 18 ÷ 3 = 6 0
  • 21 ÷ 4 1. Start with 21 goldfish crackers.2. How many times did you subtract 4?
  • Repeated 21 To get the answer, count the number of times you -4Subtraction 1 subtracted 4. 17 -4 2 Keep subtracting 3 until 13 you reach zero! -4 3 9 -4 4Since you can’t subtract 4 from 5 1, this number becomes your -4 5 remainder. 1 21 ÷ 4 = 5 r 1
  • Use repeated subtraction to solvethe following division problems on your slates. 28 ÷ 9 72 ÷ 12
  • ClosureAnswer the following question on your slate:What are two strategies you can use to solve division problems?