Do you mathematics? count.98-65=. 54+46= 24+63= 14+72-19= записать примеры буквами.

Ninety-eight minus sixty-five
fifty-four plus forty-six
twenty four plus sixty-three
fourteen plus seventy-two minus nineteen

The bicycle has a history that goes back about 600 years and is quite different than the bike as we know today.The first bike was invented in 1418, an Italian engineer, Giovanni Fontana.He constructed a human-powered deviceconsisting of four wheels and a loop of rope connected by gears, according to the International Bicycle Fund (IBF).In 1813, about 400 years after Fontana built his wheeled contraption, a German aristocrat and inventor named Karl von Drais began work on his own version of a Laufmaschine (running machine), a four-wheeled, human-powered vehicle. Then in 1817, Drais debuted a two-wheeled vehicle, known by many names throughout Europe, including Draisienne, dandy horse and hobby horse. 

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4 The lesson hadn't begun yet, and the children were talking loudly in the corridor. 5 I have lived in St. Petersburg since 1991. 6.By the fifteenth of January the students had passed all the examinations. 7. The students had written the paper by dinner-time. 8. They had been sailing down the river for many hours before they came to the village. 9. I haven't been to my home town for five years. 10. The rain had stopped by the time we reached home. 11. The message arrived five minutes after he had left the house.