91 - [ 20 - { 16 \div ( 39 + 3of3 - 40 ) } ]
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Answer:
91-[20-{16÷(39+3×3-40)}]
= 91-[20-{16÷8}]
= 91-[20-2]
= 91-18
= 73
Points to remember:
BODMAS - Bracket Of Division Multiplication Addition Subtraction
Simplify the terms inside () followed by {}, then [].
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