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hierarchy

 Always follow the correct order of operations in calculations:


  - Brackets first
  - Divide and multiply (work from left to right)
  - Add and subtract

Exercise

Calculate:

a) 8 + 5 · 3 =

b) 8:2 - 3 · 1 + 2 =

c) 3 + 2·(5 + 1) -11 + 8:4 =

d) 25 - 3·[(9+2) - 16:(3 + 1)] + 8·2=

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