(-21/6 -31/4): 23/5+ 2/3 *21/4- 5 1/6

(-21/6-31/4): 23/5+2/3*21/4-5 1/6=-4 31/276 1) -21/6-31/4=-42/12-93/12=-135/12 2) -135/12: 23/5=-675/276 3) 2/3*21/4=21/6 4) -675/276+21/6=-675/276+966/276=291/276 5) 291/276-5 1/6=1 15/276-5 1/6=1 15/276-5 46/276=-4 31/276

1) - 21/6 - 31/4 = - ( 42/12 + 93/12) = - 135/12  2) - 135/12 : 23/5 = - 675/276  3) 2/3 * 21/4 = 21/6 4) - 675/276 + 21/6 - 5 1/6 = - 675/276 + 966/276 - 31/6 = 291/276 - 1426/276 = - 1135/276 = = - 4 целых 31/276

1) 6-2=4(л) в бидоне. 2) 6+4=10(л)всего.

в 1 кг - 1000г, 1000/5 = 200. 12х200 = 2400 желудей.

в 5 кг - 5000г, 5000/5 = 1000. 12х1000 = 12000 желудей