<span>8 дес. 8ед.=88
7дес. 1 ед. =71
10 дес. =100
9 дес. 6 ед. =96
</span>
1) 21<span>²=441
2)441:7=63
3)63</span><span>²=3969
4)4*</span>3³⁻=4*1/3³=4*1/27=4/27
5)4*3969/27=588
6)588:49=12
Ответ:12
1) 4, 10
2)4, -8, 0, 10, -42
3)4, 1/3, 6,8, 12 целых 4/9, 10,
4) -8, -42
5)1/3, 6,8, 12 целых 4/9