6.1 The Addition/Subtraction Facts Table

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6.1 The Addition/Subtraction Facts
Table Objectives To provide experience
exploring patterns in sums of two dice and to
introduce the Addition/Subtraction Facts
Table. Math Journal 2----- pages 109, 110 Home
Link Math Masters Pages 162 and 163 Math Masters
page 324 2 dice per partnership slate number
cards 0-9 (four of each) tool-kit
pennies Enrichment 2 sets of 6/6 dominoes 2
polyhedral dice per partnership chart paper
Addition Subtraction Chart
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Math Message On our slate, write two addition
facts that have 5 as a sum.
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What facts did you write? We will write each
sum-of-5 fact as a number model on this board
until all of the facts and their turn-arounds are
listed. Do not repeat a fact.
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Make a record dice- throw record of facts for two
numbers.
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Student Page, Math Journal 2, Page 109
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Thinking time . . . be ready to answer
How many ways can you roll 2 or 12? How many
ways can you roll 9 (or 5)? Why are there more
facts in the 7 column than in any of the other
columns? For which sums are there an even number
of facts? Why do odd sums have an even umber of
facts? For which sums are there an odd number of
facts? Why do even sums have an odd number of
facts?
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Good Work!
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The addition/subtraction facts table
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What is 9 plus 8? Use any strategy you wish to
find the sum.
Now we will find 9 8 using the
addition/subtraction facts table.
Get a sheet of paper and put an arrow in the
lower left corner.
OK!
Now we will find 9 8 using the
addition/subtraction facts table. Next slide,
please.
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FOLLOW ALONG AS WE TRY SOME PROBLEMS. Listen
carefully.
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Addition Top-It
Directions 1. Shuffle the deck and place it
number-side down. 2. Each player turns over 2
cards and call out the sum. Use the
addition/subtraction Facts Table, if
necessary. 3. The players with the largest sum
wins the round and takes all of the cards. 4.
In case of a tie, each tied player turns over 2
more cards. The player with the largest sum
takes all of the cards from both plays. 5. The
game ends when not enough cards are left for each
player to have another turn. 6. The player with
the most cards win. Alternative Play for the
lowest sum, and the player with the least cards
wins.
Tally the "cards" each player wins . . .

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Student page 110
Home links 162 and 163.