Unit 3 Review

1. Put the decimals in the correct place in the answer:
   1. [latex]\begin{array}[t]{rr}&66\\ \times&0.9\\ \hline &594\end{array}[/latex]
   2. [latex]\begin{array}[t]{rr}&19.5\\ \times&3.47\\ \hline&67665\end{array}[/latex]
2. Find the product:
   1. [latex]\begin{array}[t]{rr}&0.78\\ \times&1.4\\ \hline\\ \end{array}[/latex]
   2. [latex]\begin{array}[t]{rr}&3.469\\ \times&4.63\\ \hline\\ \end{array}[/latex]
   3. [latex]\begin{array}[t]{rr}&7.94\\ \times& 4.02\\ \hline\\ \end{array}[/latex]
3. Multiply by 10, 100, or 1000:
   
   1. 0.53 × 10 =
   2. 7.89 × 10 =
   3. 0.472 × 10 =
   4. 3.7834 × 100 =
   5. 46.3214 × 100 =
   6. 42.42 × 100 =
4. Solve the following word problems:
   1. Mark rides his bike at a speed of 11.4 km an hour. How much distance will he cover in a 7.5 hour bike ride?
   2. Johnny spends 3.25 hours cleaning the civic centre twice a week. How many hours does he work each week?
   3. Joe and Kat’s rectangular family tent measures 3.4 m by 2.9 m. How much area does the floor of the tent cover?

Answer Key to Unit 3 Review

1. 1. Put the decimals in the correct place.
      1. 59.4
      2. 67.665
   2. Find the product.
      1. a 1.092
      2. 16.06147
      3. 31.9188

1. Multiply by 10, 100, or 1000.
   1. 5.3
   2. 78.9
   3. 4.72
   4. 378.34
   5. 4632.14
   6. 4242
2. Solve the following word problems
   1. 85.5 km
   2. 6.5 hours
   3. 9.86 m sq.