2 5/8×(5/7-3/5)-9:2 1/4=-3 7/10
5/7-3/5=(5*5-3*7)/35=4/35
2 5/8*4/35=21/8*4/35=3/10
8:2 1/4=9:9/4=4
3/10-4=3/10-3 10/10=-3 7/10
3.5х-2.3x+3.8=4.28; 1,2x=0,48; x=0,4
30+12=42
ответ 42 капусты приготовили.
<span>60 * 5 + 42/6 * 8 / 690 + (480 - 180) * 6 = </span> 2100ц 28/345<span>
1) 480 - 180 = 300
2) 60 * 5 = 300
3) 42/6 * 8 = 56
4) 300 * 6 = 1800
5) 56 / 690 = 56/690 = 28/</span><span>345
6) 300 + 28/345 + 1800 = </span><span>2100ц 28/345
4 дм^2 + 829 мм^2 = 4 дм^2 + 0.0829 дм^2 = 4.0829 дм^2
</span><span>8 дм^2 - 1700 мм^2 = 8 дм^2 - 0.17 дм^2 = 7.83 дм^2</span>