Math 204 How Many More, How Many Fever Worksheet Page 2
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1
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5Lesson 7
David has 19 stars on his achievement chart.
Mark has 16 stars on his. How many fewer stars
does Mark have than David?
Solution
fewer stars
1 1 9 9
3 3
– – 1 1 6 6
The problem asks how many fewer.
3 3
Subtract to find how many fewer.
Remember: For facts that subtract 9, the answer is
1 more than subtracting 10.
1 2
1 2
– 3
12
– 9
3
9
9
3
Finish the four
related facts.
1.
1 1 2 2
1 1 2 2 – – 9 9 = = 3 3
3 + 9 =
Order may vary.
9 9 + + 3 3 = = 1 1 2 2
1 1 2 2 – – 3 3 = = 9 9
2.
3
1 2
1 2
9
9
1 1
1 2
1 2
+ 9
– 9
– 3
+ 3
+ 6
– 9
– 3
– 9
1 1 2 2
3 3
9 9
1 1 2 2
1 1 5 5
2 2
9 9
3 3
1
3.
4
8 3 5
6 2 8
5 3 4
6 9 5
1 7
4
1 1
1 1
1 1
+ 1 6 2
– 4 0 7
+ 3 4 9
+ 1 5 2
+ 5 9
+ 7
9 9 9 9 7 7
2 2 2 2 1 1
8 8 8 8 3 3
8 8 4 4 7 7
7 7 6 6
1 1 6 6
31
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