Câu hỏi:

Tính.

a) 376 + (315 + 624) = .......................................... = .......................................... = ..........................................	c) \(\frac{5}{7} \times \frac{8}{{23}} + \frac{8}{{23}} \times \frac{5}{7}\) = .................................................. = .................................................. = ..................................................   = .................................................. = .................................................. = ..................................................
b) 241 – (23,8 + 16,2) – 12,6 = .......................................... = .......................................... = .......................................... = ..........................................