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Math Unit 2 Review
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Write at least five names for 9.
Nine, > > > > > > > > >, *********, OOOOOOOOO, 8+1, 10-1, 5+4
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8 + ? = 10
2
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Write all the doubles facts.
1+1=2, 2+2=4, 3+3=6, 4+4=8, 5+5=10, 6+6=12, 7+7=14, 8+8=16, 9+9=18, 10+10=20
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Add. 4+?=8
4
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Take an odd number of pencils. How many pencils did you take? ____ Write a number model with your number of pencils as the sum. _____________
Ex. 9, 5+4=9
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How much money?
37 cents
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Add. 3+3 = ?
6
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Write at least 5 combinations of 10 facts.
Ex. 1+9=10, 2+8=10, 7+3=10, 9+1=10, 6+4=10
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Solve the problem.
-2
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Solve the problem.
40, 35, 30, 25
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Write a helper fact, then write the final answer. 6+5=?
Helper fact: 5+5=10, 6+5=11
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Bill knew that he could use 7+3=10 to figure out the sum for 7+4. Explain Bill’s thinking. You may use the double ten frame.
If he knows that 7+3 gives you 10 then all he has to do is add 1 more to get 7+4=11
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Solve the problem.
7, 12, 17, 22, 27
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Write an addition fact for the domino. Write the turn around fact for the domino.
2+4=6, 4+2=6
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Add. 5+5=?
10
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How much money is there?
21 cents
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Add. 8+2=?
10
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Write the helper fact, then write the final answer. 5+4=?
Helper Fact: 4+4=8, 5+4=9
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Okay!
Write an addition fact for the domino. Write the turn around fact for the domino.
5+0=5, 0+5=5
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Okay!
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