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✥ Rule to be used :- BODMAS
= Bracket Off Division Multiplication Addition Subtraction.
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(b) Including one pair of brackets to make the total value equal to 21.
→ Statement given : 16 + 5 ÷ 2 - 1
= 16 + 5 ÷ (2 - 1)
= 16 + 5 ÷ 1
= 21 ÷ 1
= 21 → Value
(c) Including two pairs of brackets to make the total value equal to 3.
→ Statement given : 16 + 5 ÷ 2 - 1 + 6
= (16 + 5) ÷ (2 - 1 + 6)
= 21 ÷ 7
= 3 → Value
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