Soluzione del esercizio 5 di Into Focus B2

Esercizi svolti per il libro Into Focus B2

Soluzione

  1. It is known that most mathematical symbols were invented in the 1500s. / Most mathematical symbols are known to have been invented in the 1500s.
  2. The 17th century is considered to be a high point in the history of mathematics. / It is considered that the 17th century was a high point in the history of mathematics.
  3. It was thought by many teachers that calculators could harm students' Maths skills. / Calculators were thought by many teachers to harm students' Maths skills.
  4. There are estimated to be over 10,000 new Maths graduates every year in the UK. / It is estimated that there are over 10,000 new Maths graduates every year in the UK.