Question

•300-6×8+84:7+50×30-89×3=
•152 185-(321 473-169 265+3-6200:200)=
•(368×12-5×70+31×8-3301)×0+170=
•75:15+5×(250×4:10×3:30)= •2000(120×5+800:2-250×2)-361:361=
•(1000-250×4)+0+10-10+3×200:6-34=
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Answer 1

300-6×8+84:7+50×30-89×3=
=300-48+12+1500-267=
=1812-315=
=1497
152185-(321473-169265+3-6200:200)=
=152185-(152208+3-31)=
=152185-(152208-28)=
=152185-152180=5

(368×12-5×70+31×8-3301)×0+170=0+170=170

75:15+5×(250×4:10×3:30)=
=5+5×(1000:10×3:30)= 
=5+5×(100×3:30)= 
=5+5×(300:30)= 
=5+5×10=55 

2000(120×5+800:2-250×2)-361:361=
=2000(600+400-500)-1=
=2000×500-1=1000000-1=999999


(1000-250×4)+0+10-10+3×200:6-34=
=(1000-1000)+600:6-34=
=0+100-34=66