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Sandra MacDonald 2006 Multiply your chances! Terrible 2s, 4s & 5s Simple 6s & 7s Everyone 8s & 9s 2-digit dilemnas Multiply your money Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Last Chance
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$100 question from Terrible 2s, 4s & 5s
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$100 answer from Terrible 2s, 4s & 5s 2 x 6 = 12
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$200 question from Terrible 2s, 4s & 5s 0 5 10 15 20 0 5 10 15 20 A multiple of five that is greater than 22
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$200 answer from Terrible 2s, 4s & 5s 25, 30, 35, 40…. Any number greater than 22 that you say when you skip count by 5
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$300 question from Terrible 2s, 4s & 5s Ed has saved $7. Toby has saved four times as much. How much has Toby saved?
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$300 answer from Terrible 2s, 4s & 5s 4 x $7 = $28 Toby has saved $28.
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$400 question from Terrible 2s, 4s & 5s If there are 22 students in a classroom, how many shoes will they be wearing?
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$400 answer from Terrible 2s, 4s & 5s 22 x 2 = 44 Each student wears two shoes; in all there will be 44 shoes.
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$500 question from Terrible 2s, 4s & 5s If there is chocolate and vanilla ice cream with plain and sugar cones, how many different double scoop cones can you have?
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$500 answer from Terrible 2s, 4s & 5s Plain cone Sugar cone 1.Choc-choc 2.Choc-van 3.Van-van 4.Choc-choc 5.Choc-van 6.Van-van
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$100 question from Simple 6s & 7s.
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$100 answer from Simple 6s & 7s 7 x 6 = 42
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$200 question from Simple 6s & 7s How many legs are there on 8 spiders?
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$200 answer from Simple 6s & 7s One spider has 8 legs. 8 x 8 = 64 Eight spiders have 64 legs.
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$300 question from Simple 6s & 7s Jacqueline biked 6 km per hour. At this rate, how far did she bike in 5 hours?
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$300 answer from Simple 6s & 7s Each hour she biked 6km 6km x 5 hours = 30. Jacqueline biked 30 km.
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$400 question from Simple 6s & 7s How many days are there in nine weeks?
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$400 answer from Simple 6s & 7s 7 days x 9 weeks = 63 days
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$500 question from Simple 6s & 7s How is 6 x 7 different from 7 x 6?
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$500 answer from Simple 6s & 7s 6x7 means six groups of seven 7x6 means seven groups of six Six groups of seven could be six weeks with seven days in each week. Seven groups of six would not be days of the week.
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$100 question from Everyone loves 8s & 9s
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$100 answer from Everyone loves 8s & 9s 8 x 5 = 40
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$200 question from Everyone loves 8s & 9s 0 9 18 0 9 18 The third multiple of 9
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$200 answer from Everyone loves 8s & 9s 9, 18, 27
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$300 question from Everyone loves 8s & 9s Are there more odd or more even multiples of nine? Explain how you know.
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$300 answer from Everyone loves 8s & 9s 9, 18, 27, 36, 45, 54, 63, 72, 81 Multiples of nine alternate between odd and even, so there are the same number of even and odd multiples.
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$400 question from Everyone loves 8s & 9s How can you use what you know about multiplying by four to help you multiply by eight. Give an example.
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$400 answer from Everyone loves 8s & 9s 8 is 2 x 4, or double four so if you know that 4 x 5 = 20, then 8 x 5 is 2 x 20 or double 20.
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$500 question from Everyone loves 8s & 9s Create a story problem to tell about 8 x 9. Explain how you would figure out the answer.
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$500 answer from Everyone loves 8s & 9s Story problems must make sense!
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$100 question from 2-digit dilemnas
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$100 answer from 2-digit dilemnas 5 x $2 = $10
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$200 question from 2-digit dilemnas
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$200 answer from 2-digit dilemnas 3 x 30 = 90
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$300 question from 2-digit dilemnas
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$300 answer from 2-digit dilemnas 4 x 311 = 1244
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$400 question from 2-digit dilemnas If a bag of cat food costs $3.99, how many bags will you be able to buy with $20?
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$400 answer from 2-digit dilemnas $3.99 is almost $4. 5 x $4 = $20 If you thought about the tax you’ll know you only have enough money to buy four bags!
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$500 question from 2-digit dilemnas Use digits 2, 4 and 5 in two different ways to calculate different answers: x
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$500 answer from 2-digit dilemnas 24 x 5 = 120 25 x 4 = 100 42 x 5 = 105 45 x 2 = 90 52 x 4 = 208 54 x 2 = 108
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$100 question from Multiply your money
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$100 answer from Multiply your money 4 x 10¢ = 40¢
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$200 question from Multiply your money
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$200 answer from Multiply your money 3 x 25¢ = 75¢
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$300 question from Multiply your money How much would you have to pay to buy four bottles of water if each bottle cost $1.25?
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$300 answer from Multiply your money 4 x $1.25 = $5.00
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$400 question from Multiply your money Is this enough money to buy something at the dollar store? Explain your answer.
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$400 answer from Multiply your money 20 x 5 ¢ = $1.00, but there is tax on items at the Dollar Store, so it is not enough money.
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$500 question from Multiply your money How many quarters do you need to make $7.00? How can you use multiplication to find the answer?
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$500 answer from Multiply your money There are four quarters in each dollar. 4 x 7 = 28 There are 28 quarters in $7.
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Final Chance Explain how you know that 152 x 2 is greater than 300.
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Final Chance answer 150 x 2 = 300 152 is 2 more than 150, so 152 x 2 must be greater than 300.
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