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Set 1-12 (pages
38–39) |
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| Find 6.78 + 3.376. |
Remember to line up the decimal points when you add. |
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| Estimate: 7 + 3 = 10 |
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| 1.
9.8 + 2.563 |
2.
0.7 + 0.685 |
| 3.
14.55 + 8.92 |
4.
33.42 + 17.833 |
| 5.
1.19 + 15.86 |
6.
76.75 + 7.675 |
| 7.
0.19 + 0.999 |
8.
92.5 + 8.825 |
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| 10.156 is reasonable since it is close to 10. |
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| Set 1-13 (pages
40–41) |
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| Find 6.9 – 3.876. |
Remember that you can check your
answer by adding. |
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| Estimate: 7 – 4 = 3 |
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| 1.
3.8 – 2.63 |
2.
4.83 – 2.165 |
| 3.
22.31 – 8.203 |
4.
6.2 – 0.5 |
| 5.
47.51 – 33.415 |
6.
0.9 – 0.778 |
| 7.
2.78 – 0.09 |
8.
10.0 – 4.32 |
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| 3.024 is reasonable since it is close to 3. |
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| Set 1-14 (pages
42–43) |
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Art Class Trisha, Todd, and Pierre are in
the same art class. Trisha said there are
between 18 and 23 students in the class.
Todd said there are fewer than 22. Pierre
said the number of students is even. How
many students are in the class? |
Remember to look back and check after
you solve a problem. |
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Did
Katie answer the right question? |
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Does Katie’s
work match the
information in the problem? |
| 3. |
Did Katie
use a correct procedure? |
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| There are 20 students in the class. |
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