Câu 1: trang 165 - toán tiếng anh lớp 5CalculateTính:a) 12 hours 24 minutes + 3 hours 18 minutes12...

Cách làm:

a)
12 hours 24 minutes + 3 hours 18 minutes
= (12 + 3) hours + (24 + 18) minutes
= 15 hours 32 minutes

14 hours 26 minutes - 5 hours 42 minutes
= (14 - 5) hours + (26 - 42) minutes
= 9 hours + (60 - 16) minutes
= 9 hours 44 minutes

b)
5,4 hours + 11,2 hours
= 5,4 + 11,2
= 16,6 hours

20,4 hours - 12,8 hours
= 20,4 - 12,8
= 7,6 hours

Câu trả lời:
a)
12 hours 24 minutes + 3 hours 18 minutes = 15 hours 32 minutes
14 hours 26 minutes - 5 hours 42 minutes = 8 hours 44 minutes

b)
5,4 hours + 11,2 hours = 16,6 hours
20,4 hours - 12,8 hours = 7,6 hours