①8-(-4)÷2²×3
=8+4÷4×3
=8+3
=11
②(-3)³÷(-3)÷9
=9÷（-3）÷9
=-1/3
③7×3²÷3+(-3)
=7×9÷3-3
=21-3
=18
④-5+16-16÷(-2)³
=-5+16-16÷（-8）
=11+2
=13
⑤(-28)÷(-6+4)+(-1)×5
=-28÷（-2）-5
=14-5
=9
⑥2÷(-2)+0÷7-(-8)×(-2)
=-1+0-16
=-17
⑦3×4²+80÷5÷2³-27
=3×16+16÷8-27
=48+2-27
=50-27
=23
⑧12²÷(-3)²×(-2)³-(-9)²÷3³
=144÷9×（-8）-81÷9
=16×（-8）-9
=-128-9
=-137
⑨-5+28÷（-2）×(-14)
=-5-14×（-14）
=-5+196
=191
⑩-2³÷4×(-5)²
=-8÷4×25
=-2×25
=-50