6 ×7 =42
7 ×6 =42
6×6 ×6×6×6 ×6×6=42
<span>(-1,1)-7:(3 1/12-1,625)*1 1/59</span>=-5цел579/590
1)3 1/12-1,625=37/12-1625/1000=1 11/24
2)7:1 11/24=7:35/24=4 4/5
3)4 4/5*1 1/59=24/5*60/59=4 52/59
4)-1,1-4 52/59=-11/10-288/59=-5 579/590
45ц=4500 кг(45*100);
23т=23000кг(23*1000);
3ч10мин=190мин (180*6+10);
600с=10 мин (600:60)
А) = -1/2 - 7/10 + 3/5 - 11/20 = - 10/20 - 14/20 + 12/20 - 11/20 = 12/20 - (10/20 + 14/20 + 11/20) = 12/20 - 35/20 = - 23/20 = - 1 3/20