Tính: a, 6 mũ 3 mũ 1 chia 6 mũ 2 mũ 1 b, 7 mũ 2 mũ 1 mũ 2 chia 7
Giải thích
a, 631:621=6.6.61:6.61 = 6
b, 7212:7=7212:7=72:7=7
c, 20182018:12018=20182018:1
= 201820:1=20181:1=2018
a, 631:621=6.6.61:6.61 = 6
b, 7212:7=7212:7=72:7=7
c, 20182018:12018=20182018:1
= 201820:1=20181:1=2018