Solve multiplication and division problems that involve fractions.
Use rounding to check the answers to multiplication and division problems.
Number Framework Stage 8
Using Number Properties
Problem: “Estimate 0.503 x 58.7.”
Discuss why ½ x 60 = 30 is sensible.
Problem: “Martha gets 34.56 ÷ 0.98 = 33.8688 on her calculator. Is she correct?”
(Answer: Martha must be wrong as division by a number less than 1 makes the answer bigger.)
Problem: “Estimate 59.89 x 0.091.” (Possible answer: 59.89 x 0.091 ≈ 60 x 0.1, and 1 tenth of 60 = 6.)
Examples: Worksheet (Material Master 8–17).