80÷4[400÷4{7+(19+8-24)}]
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2
Answer:
20.28
Step-by-step explanation:
=80÷4[400÷{7+(17-24)}]
=80÷4[400÷{7+7}]
=80÷4[400÷14]
=80÷4[28]
=20.28
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