Ask some rational arithmetic questions ①-9÷3+(1/2-2/3)×12+3² ② The 99th power of (- 3) × (- 2) - (- 1) △ 1 / 2
①-9÷3+(1/2-2/3)×12+3²
=-3-2+9
=4
② The 99th power of (- 3) × (- 2) - (- 1) △ 1 / 2
=6+1*2
=8
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