Select and carry out calculations in the correct order of precedence using the ‘rules’ of BODMAS (Brackets first then Other then Division then Multiplication then Addition and finally Subtraction).
Part ofApplications of MathsNumeracy skills
Calculate: \(3 \times (7 - 3)\)
In this question, we have a bracket, a subtraction and a multiplication.
BODMAS tells us that brackets come first, so we calculate:
\(3 \times (7 - 3) = 3 \times 4 = 12\)
Calculate \(2 + 3 \times 5 - 4\)
Did you get 13? If not, remember that multiplication comes before addition and subtraction, so we have:
\(2 + 3 \times 5 - 4\)
\(= 2 + 15 - 4 = 13\)
Paula says that \(2 \times 3 - 2 \times 5 = - 4\)
Steve says the answer is \(10\). Who is right, and why?
Paula is correct. Multiplication comes before addition and subtraction, so:
\(2 \times 3 - 2 \times 5 = 6 - 10 = - 4\)
Calculate \({(15 - 3 \times 2)^2}\)
\({(15 - 3 \times 2)^2}\)
\(= {(15 - 6)^2}\)
\(= {(9)^2} = 81\)
Put brackets into this equation to make it work \(4 \times 5 - 3 = 8\)
\(4 \times (5 - 3) = 8\)
Put symbols and brackets into this equation to make it work \(7\,5\,3 = 6\)
\((7\, - 5)\, \times 3 = 6\)
