200:2*(540+460):10=1000
540+460=1000
200:2=100
1000*100=100000
100000:10=10000
200:2*540+460:10=5446
200:2=100
100*540=54000
54000+460=54460
54460:10=5446
200:2*(540+460:10)=58600
460:10=46
540+46=586
200:2=100
586*100=58600
1200-200:40*5*5=1075
200:40 =5
5*5=25
25*5=125
1200-125=1075
1200-200:(40*5)*5=1195
40*5=200
200:200=1
1*5=5
1200-5=1195
(1200-200:40)*5*5=49875
200:40=5
1200-5=1195
1955*5=9975
9975*5=49875
4ч * 5км/ч = 20 км
3ч * 12км/ч = 36 км
20км + 36км = 56км
<span>1) 80 + 6 ∙ 5 (600 – 550) : 2=80+6</span>∙5∙50: 2=80+6∙250: 2=80+1500: 2=80+750=830
2) 300 – 25 ∙ 4 15 ∙ 4 + 720=300-103.75∙ 4 =300-415=-115
3) 450 + 16 ∙ 5 36 ∙ 2 + 410=450+85.76∙ 2=450+171.52=621.52