Question

18[19+{16-(15-2×8÷4+)}]


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Answer 1

Answer:

36−[18−{14−(15−4÷2×2)}]=36−[18−{14−(15−

2

4

×2)}]=36−[18−{14−(15−2×2)}]

=36−[18−{14−(15−4)}]=36−[18−{14−11}]=36−[18−3]=36−15=21