Addition And Subtraction Problems Worksheet Page 12
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40Refer to the problem on the previous page.
1. Why does it make sense to round in
3. Why did the boys round each dollar
this situation?
amount up?
2. Suppose it costs $16 for nails, $109 for
4. Why is it a good idea to round up
tools, and $62 for wood. What would a
when dealing with money even if the
good estimate be? Explain.
number would be rounded down?
EXTRA
See page R5.
Tell whether an estimate or exact
9. Jacob is taking a test at school. The
answer is needed. Then solve.
question is shown below. What is the
answer?
5. Determine if Tammy, Anessa, and
Jaleesa have more than 110 CDs.
23 + 34 + 17
10. Tracy is allowed to watch 2 hours of
C02-001A-105733
television each night. About how much
television does she watch in a year?
Measurement
11.
Rodney needs to
6. Samuel bought a sweater for $36 and
measure the distance around his
paid with a $50 bill. About how much
garden. How much fencing should
change should he get back?
Rodney buy?
22 in.
7. A theater can hold 200 people. Two
groups rented out the theater. The first
group has 92 people and the other
has 107 people. Are there enough
22 in.
22 in.
seats for everyone? Explain.
8. Carissa pays $2 each day for lunch.
Her money is in an account that is
22 in.
deducted each time she buys a lunch.
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RV
There are 6 days until the end of the
12.
A newspaper
school year and her account has
stated that the population of California
$13 in it. How much money will
was 33,871,600. Explain why this is
she get back at the end of the year?
probably an estimate.
Lesson 2-3 Problem-Solving Skill: Estimate or Exact Answer 63
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