Whole numbers - EdexcelOrder of operations

Calculate the value of \(3 + 4^2 - 10 \div 2\).

1. There are no brackets (B), so calculate the power or index number first (O or I). \(4^2 = 16\) so the calculation becomes \(3 + 16 - 10 \div 2\).
2. Do any divisions or multiplications (DM), working from left to right: \(10 \div 2 = 5\) so the calculation becomes \(3 + 16 - 5\).
3. Then, do any additions or subtractions (AS), working from left to right: first do the addition, \(3 + 16 = 19\) so the calculation becomes \(19 - 5\).Then do the subtraction to give the answer 14.

Calculate the value of \([40 - (2 + 4^2)] \times 2\).

1. Using the BODMAS/BIDMAS rule, first calculate the inside brackets (B). Work out the power or index in order to do this (O or I): \(2 + 4^2 = 2 + 16 = 18\), giving \([40 - 18] \times 2\).
2. Next, do the outer brackets: \(40 - 18 = 22\) giving \(22 \times 2\).
3. Once the brackets have been calculated, finish with the multiplication: \(22 \times 2\) to give 44.