Вычислим значение выражения по действиям:
1) 1 1/12+1 1/4 = 1+ 1+ 1/12 + 1/4 = 2 + 1/12 + 3/12 = 2 + 4/12 = 2 + 1/3 = 2 1/3
2) 2 1/3 * 1 19/56 = 7/3 * 75/56 = (7* 75) /(3 * 56) = 75/(3 * 8) = 25/8 = 3,125
3) 2 5/8*1 3/7*1 1/9 = 21/8 * 10/7 * 10/9 = (21*10*10)/(8*7*9) = (3*5*5)/(2*9) = 25/6 = 4 1/6
(1 1/12+1 1/4)*1 19/56+2 5/8*1 3/7*1 1/9 = 4 1/6
Ответ: 4 1/6
1. не знаю ответа
2. <span>Rob's feet hurt because he was wearing his wellingtons.
3. Misha carried Rob`s backpack, gave his trainers, a plaster, a warm jacket and a pair of socks.
4. Rob was cold because he hadn`t got a warm jacket.
5. Misha put up the tents.
6. Rob was eating sandwiches, yoghurt and biscuits.
7. They found him behind the tent.
8. </span><span>Misha's face was as red as a beetroot because his friends found Rob was eating their snacks. Also Rob didn`t want to do anything, but everybody had to help him.
9. Rob promised to think about his behaviour and be as good as gold.</span>
1. where do polar bears live?
2. ls polar bear the largest animal in the world?
3. how long do polar bears live for?
4. how do you think why a polar bear was chosen as a symbol of olimpic games in canada?
5. what do polar bears usually eat?
6. are polar bears dangerous?
7. why did wwf announced 2013 to be the year of the polar bear?
12) had been practicing, entered
13) were, had lost
14) didn't have, had had already booked
15) was washing, broke, cut
1. Have you got ANY English book at home? 2. There are SOME schools in this street 3. Are there ANY pictures in you book? 4. There are SOME flowers here in winter. 5. I can see SOME children in the yard. They are playing.
2. a teacher's book
our friend's boy
this girl's picture
the painter's studio