Solve multiplication and division problems that involve fractions.
Number Framework Stage 8
When big gets small (Material Master 8-15).
Using Number Properties
Problem: “Nara buys 0.345 kilograms of chocolates, which costs $9.78 per kilogram. Work out the approximate cost. Is the answer less than or more than $9.78?”
(Possible answer: 0.345 x 9.78 ≈ 3 tenths of 10 = 3. So the answer is less than $9.78.)
Use the calculator to find the cost of the chocolates and round sensibly.)
(Answer: 0.345 x 9.78 = 3.3741 = $3.37 to the nearest cent.)
Examples: Worksheet (Material Master 8–15).
Understanding Number Properties:
How will you work out whether the answers to problems like 56.8 x 1.088 or 0.000123 x 567 get bigger or smaller?
Understanding Number Properties:
z x y is always smaller than z when y is ... (Answer: less than 1).
z x y is always bigger than z when y is ... (Answer: greater than 1).