\(100+200+800+500\times851+10000:100\)
\(=300+800+425500+100\)
\(=1100+425500+100\)
\(=1200+425500\)
\(=426700\)
100+200+800+500x851+10000:100= 100 + 200 + 800 +425500 + 100 = 426700
100 + 200 + 800 + 500 x 851 + 10000 : 100
= 100 + (200 + 800) + 425500 + 100
= 100 + 1000 + 425500 + 100
= 1100 + 425600
= 426700.