С1 и 3 номером. заранее большое

1.20+9=29прегноя и золи 2.29+2=31пр. зол.и торфу. 3.58-31=27кг песка

58-20-9-2=27(кг)песка было в 58 кг садовой земли. ответ: 27кг.

In russia children go to school at the age of 6 to 7. the first academic year begins on 1 september. over the next 11 years of his life on 1 september will be their special day — back to school, study, meet with classmates, meeting new teachers and subjects. in russia the school is divided into primary school (grades 1-4), incomplete secondary school (5-9 grades) and high school (10-11 grades). children learn 5 or 6 days a week in primary school and 6 days in middle and high school. in most regions of the russian federation the academic year is divided into 4 blocks with breaks for one or two weeks between them and a longer summer break. some schools used trimesterly system that divides the academic year into three quarters. exams are an important part of school life. students must turn them in after the 9th and 11th years of study. students who have graduated from junior high school exams, called the state final certificates (gai), and when the exam will receive a certificate. the certificate gives students access to further education. they can continue their education in high school or go to college. at the end of the 11th year at school, students pass the unified state examination (use). if they pass the exams, they can go to university. in russia there is a developed network of schools offering advanced programmes in some disciplines, such as foreign languages, art, sports or math. there are several schools in which senior grades work under the auspices of various universities, including msu. university. i have english 3 the fact of faith