Question 31

If the mathematical operator '$$\div$$' means '$$\times$$', '+' means '—',' $$\times$$' means '+' and '—' means '$$\div$$', then 25 + 18 — 3 $$\times$$ 7 + 3 =?

Solution

25 + 18 — 3 $$\times$$ 7 + 3 =?

=$$25 - 18\div 3 +7 -3$$ =?

apply bodmass

=$$25 - 18\div 3 +7 -3$$ 

=$$25 - 6 +7 -3$$ 

=23


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