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Practice
N
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2
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3
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4
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5
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6
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8
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1
0
,
1
2
)
A
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(
A
x
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b
)
(
2
,
3
,
4
,
5
,
6
,
8
,
1
0
,
1
2
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M
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(
C
x
a
/
b
)
(
2
,
3
,
4
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5
,
6
,
8
,
1
0
,
1
2
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C
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(
2
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M
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Add/sub using models (incl mixed numbers) (2,3,4,5,6,8,10,12)
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