Tính nhanh:
a) (525 + 315) :15
b) (2400 +72) : 24
c) (1026 – 741) : 57
d) (3600 – 108) : 36
Hướng dẫn
a) (525 + 315) :15 = 525:15 + 315 :15 = 35 + 21 = 56
b) (2400 +72) : 24 = 2400:24 +72 : 24 = 100 + 3 = 103
c) (1026 – 741) : 57 = 1026:57 – 741 : 57 = 18 – 13 = 5
d) (3600 – 108) : 36 = 3600: 36 – 108 : 36 = 100 – 3 = 97