20-{18-÷[7-2+1]}
Answers
Answered by
0
Answer:
17
Step-by-step explanation:
20-{18÷(7-2+1)}
=20-{18÷(6)}
=20-{18÷6}
=20-3
=17
Answered by
28
20 - {18 ÷ [7 - 2 + 1]}
==> 20 - {18 ÷ [5 + 1]}
==> 20 - {18 ÷ 6}
==> 20 - 3
==> 17
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