Mathematics for IGCSE & O level - The Four Operations (Section 4 - No. 7)
If the equation is 9 - 2 x 3 + 1, which order should the operations be performed?
Subtraction, multiplication, addition
Multiplication, addition, subtraction
Multiplication, subtraction, addition
Addition, subtraction, multiplication
解释
Following the rules multiplication needs to be performed before any addition or subtraction.