1)3*(8*8*8)-5*(6*6*6)=3*512-5*216=1536-1080=456.
2)(5*5-4*4)в третьей ст.=(25-16)в 3ст.=9 в 3ст=9*9*9=729.
<span>V1=14x16x25 = 5600 см3
</span><span>4м = 40дм
</span><span>V2=26x25x40=26000 дм3</span>
1) 2/3+(-10 1/3) = 2/3-31/3 = -29/3 = -9 2/3
2) -3/8+4/7 = 4/7-3/8 = 11/56
3) 3/5+(-1 5/6) = 3/5-11/6 = - 37/30 = -1 7/30
4) 2/9+(-1 5/6) = 2/9-11/6 = -27/18 = -1 9/18
5) 4/5+(-2/7) = 4/5-2/7 = 18/35
6) -9+2/9 = 2/9-9 = -79/9