3×{27-(12+6)÷3}
20-{8+(17-15)}÷5
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Answer:
Step-by-step explanation:
3×{27-(12+6)÷3}
=3 x {27-(18) ÷3}
= 3 x {27 - 18 ÷3}
= 3 x {21}
= 63
20 - {8+(17-15)÷5}
= 20 - {8 +(2)÷ 5}
= 20 - {8+ 2÷ 5 }
= 20 - {10 ÷5}
= 20 - {2}
= 20 - 2
=18
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