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Dividing
by Multiples of 10 (4-1) |
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| Find
each quotient. Use mental math. |
| 1. |
240
÷ 10 |
| 2. |
810
÷ 90 |
| 3. |
20,000
÷ 400 |
| 4. |
28,000
÷ 70 |
| 5. |
4,800
÷ 60 |
| 6. |
56,000
÷ 80 |
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 Explain
how you found the
quotients in Exercises 1- 4. |
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How
is dividing 3,200 by 80 the
same as dividing 320 by 8? |
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Estimating with Two-Digit Divisors (4-2) |
| Estimate each quotient. |
| 7. |
424
÷ 73 |
| 8. |
8,222
÷ 91 |
| 9. |
$49.24
÷ 12 |
| 10. |
452.7
÷ 89 |
| 11. |
3,461
÷ 47 |
| 12. |
$72.19
÷ 68 |
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Explain
how you found your estimate
for Exercises 7 and 8. |
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Is
your estimate for Exercise 9 an
underestimate or an overestimate?
Why? |
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Problem-Solving Strategy: Try, Check, and Revise (4-3) |
| Solve. Write
your answer in a sentence. |
| 13. |
Koko
the poodle weighs fifteen more pounds than his owner's cat Fluffy.
Together, they weigh 55 pounds. How much does each pet weigh? |
| 14. |
There
is 100 feet of fencing for a flower garden. If the length is to be
10 feet longer than the width, what will be the length and width? |
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What
strategy did you use to solve
Exercise 13? |
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Describe
the steps you used to
solve this problem. |
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What
are two strategies you could
have used to solve Exercise 14? |
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