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N
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b
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m
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d
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M
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N
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M
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I
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Lesson
Practice
C
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p
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m
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f
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(
1
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x
1
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)
M
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p
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c
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d
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f
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m
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)
(
1
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1
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F
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q
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t
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s
(
1
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1
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N
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b
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t
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n
c
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d
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(
1
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E
x
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(
1
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P
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b
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1
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1
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Stage 1
Find unknowns in multiplication and division problems (mixed)
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