(3 целых 1/6+5 целых 1/6:4 целых 2/15)*3/92 = (19/6+(31/6):(62/15))*(3/92) = (19/6+31*15/(6*62))*(3/92) = (19/6+465/372)*(3/92) = (1178/372+465/372)*(3/92) = (1643/372)*(3/92) = 4929 / 34224 = 1643 / 11408 = 53/368.<span>
Ответ: </span> 53/368.
1/5 от 250=50км-осталось пройти
250-50=200- на поезде
Ответ:
Пошаговое объяснение:
2 4/15 - (2 - 1/15) : 4/9 + 2/3 = - 1 5/12
1) 2 - 1/15 = 1 15/15 - 1/15 = 1 14/15
2) 1 14/15 : 4/9 = 29/15 * 9/4 = 29/5 * 3/4 = 87/20 = 4 7/20
3) 2 4/15 - 4 7/20 = 34/15 - 87/20 = 136/60 - 261/60 = - 125/60 = - 2 5/60 = - 2 1/12
4) - 2 1/12 + 2/3 =2/3 - 2 1/12 = 2/3 - 25/12 = 8/12 - 25/12 = - 17/12 = - 1 5/12
И 10 и 20 и 30 и 40 и 50 и 60 не делятся на 7
Но зато 70 делится на 2, 7 и 10, как наименьшее кратное.
Ответ:70
<span>0=0</span>
<span><span>10−10</span>=<span>15−15</span></span>
<span><span><span>10−6</span>−4</span>=<span><span>15−9</span>−6</span></span>
<span><span>2<span>(<span><span>5−3</span>−2</span>)</span></span>=<span>3<span>(<span><span>5−3</span>−2</span>)</span></span></span>
<span>2=3</span>
<span><span>2+2</span>=<span>3+2</span></span>
<span><span>2+2</span>=<span>5</span></span>