А)70820кг
109040кг
8т.650кг
40т.60кг
б)142000000309мг.
200050мг.
276г.600мг.
90г.37мг
6х-8=-5х-1.6
6х+5х=8-1.6
11х=6.4
<span>х=0.6</span>
<em>38:4=9(ост. 2)</em>
<em>56:5=11(ост. 1)</em>
<em>44:7=6(ост. 2)</em>
<em>65:8=8(ост. 1)</em>
<em>66:4=16(ост. 2)</em>
<em>46:5=9(ост. 1)</em>
<em>61:7=8(ост. 5)</em>
<em>29:8=3(ост. 5)</em>
<em>31:9=3(ост. 4)</em>
<em>29:6=4(ост. 5)</em>
Ответ:
(12 2/3+0,7-12,7):0,05 = 37/60
1) 12 2/3 + 0,7= 12 2/3 + 7/10 = 12 20/30+21/30= 12 41/30 = 13 11/30
2) 13 11/30 - 12,7= 13 11/30 - 12 7/10 = 13 11/30 - 12 21/30 = 12 41/30 - 12 21/30= 20/30=2/3
3)2/3:0,05= 2/3: 5/100= 200/300:15/300=185/300= 37/60