50400:12=<span>4200</span><span><span>
-24</span><span>
24</span><span>
<span>0
</span></span></span>31005:15=2067
-30
-100
90
-105
105
<span>223218:18= </span>124<span><span>
-43</span><span>
36</span><span>
-72</span><span>
72</span><span> <span>
0</span></span></span>
480640:16=30040
<span><span><span>-48
</span> 064<span>
-64</span><span>
0</span></span>
</span>
1дм=10см
5м5дм=550см
1м5дм=150см
15м=150см
длина мотка 150+150+550=850см или 8м5дм
=(2/10-1/10):3=1/10*1/3=1/30
1т=1000кг
1ц=100кг
1т6кг-6ц12кг+30ц9кг=1006кг-612кг+3009кг=3403кг.