Exercises

1. Multiply the dividend and the divisor by \(10\) or \(100\) to produce an equivalent whole number division expression.  One example is shown below.
   1. \(6 \div 0.2 = (6\times 10 ) \div (0.2 \times 10) = 60 \div 2\)
   2. \(1.5 \div 0.03\)
   3. \(1.21 \div 0.1\)
   4. \(1.8 \div 0.4\)
   5. \(0.14\div 0.07\)
2. Divide to find the quotient (the answer).
   1. \(9 \div 0.3 =\boxed{\phantom\square}\)
   2. \(2.5 \div 0.5 =\boxed{\phantom\square}\)
   3. \(4.4 \div 0.04 =\boxed{\phantom\square}\)
   4. \(1.8 \div 6 =\boxed{\phantom\square}\)
   5. \(2.15 \div 5 =\boxed{\phantom\square}\)
3. Nydan bought \(8\) metres of rope to make friendship bracelets.  If each bracelet uses \(0.4\) metres of rope, how many bracelets will he be able to make?
4. Last night, a local pizzeria used \(8.1\) kilograms of cheese while making its large pizzas.  If \(0.3\) kilograms of cheese is used for each large pizza, how many large pizzas did the company make?

5. Sam wants to build a frame of a cube using wood.  She has \(2.4\) metres of thin wood.  

   Considering the number of edges on a cube, what is the maximum length each edge of the cube can be?

   

   Source: Wood Frame - Photology1971/iStock/Getty Images

6. The average monthly temperatures for October to January in Waterloo, Ontario, Canada were \(15.2^\circ\)C, \(8.6^\circ\)C, \(1.3^\circ\)C, \(-8.7^\circ\)C.  What was the four-month average?
7. Tara's walking rate is \(2.5\) metres per second.  Her younger brother, Mike, walks \(1.1\) metres per second. Tara gives Mike a \(45\) metre head start in a \(100\)-metre race.  Who wins the race?
8. Explain how you know that \(7 \div 0.25\) is greater than \(7\) without actually calculating the answer.
9. A decimal number was divided by another decimal number and the answer was \(6\).  What might the decimal numbers have been?  Give three different answers.
10. Use each of the given numbers exactly once to complete the five division expressions below:\[ \large 10,~~ 3,~~ 5.26,~~1,~~8.5,~~2,~~5,~~2.5,~~10.2,~~8.24\]
    • \(\boxed{\phantom\square}  \div\boxed{\phantom\square} = 4.12 \)
    • \(\boxed{\phantom\square}  \div \boxed{\phantom\square} = 5.26 \)
    • \(\boxed{\phantom\square}  \div \boxed{\phantom\square} = 3.4 \)
    • \(\boxed{\phantom\square}  \div \boxed{\phantom\square} = 4\)
    • \(\boxed{\phantom\square}  \div \boxed{\phantom\square} = 1.7 \)