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Multi-Step Problems with Rational Numbers

Work through each step, then check that your answer is reasonable.

ExampleLucas has $13 and buys 5 notebooks at $6.50 each. How much is left, and is your answer reasonable?
5 × $6.50 = $32.50. $13 − $32.50 = $-19.50. Check: each notebook is about $7, so 5 cost roughly $35 — the answer is close to that, so it is reasonable.
  1. 1.Ethan has $13 and buys 4 notebooks at $9.50 each. How much is left, and is your answer reasonable?
  2. 2.At dawn the temperature is −7 °C. It rises 3 °C each hour for 5 hours. What is the temperature then?
  3. 3.A 4-meter ribbon is cut into pieces 14 of a meter long. How many pieces are there, and how many would there be from a ribbon half as long?
  4. 4.A $49 jacket is marked up 10%, then put on sale at 10% off. What is the final price, and is it back to $49?
  5. 5.A $68 jacket is marked up 20%, then put on sale at 20% off. What is the final price, and is it back to $68?