Câu 1: Trang 130 - Toán tiếng anh lớp 5:There have been many great inventions in the history of...

Cách làm:
1. Đọc bảng và tìm ra năm công bố của từng phát minh.
2. Xác định thế kỉ tương ứng với năm công bố của mỗi phát minh.

Câu trả lời:
- Telescope was invented in 17th century.
- Pencil was invented in 18th century.
- Train locomotive was invented in 19th century.
- Bicycle was invented in 19th century.
- Monocar was invented in 19th century.
- Airplane was invented in 20th century.
- Electronic computer was invented in 20th century.
- Artificial satellite was invented in 20th century.