問幾道有理數算術題 ①-9÷3+(1/2-2/3)×12+3²; ②(-3)×(-2)-(-1)的99次幂÷1/2

問幾道有理數算術題 ①-9÷3+(1/2-2/3)×12+3²; ②(-3)×(-2)-(-1)的99次幂÷1/2

①-9÷3+(1/2-2/3)×12+3²;
=-3-2+9
=4
②(-3)×(-2)-(-1)的99次幂÷1/2
=6+1*2
=8