90 + 20 = 110
30 x 20 = 600
10 - 10 = 0
1000 : 1 = 1000
90+20=110
30x20=600
10-10=0
1000:1=1000
90+20 = 110
30X20 = 600
10-10= 0
1000:1=1000
90 + 20 = 110
30 × 2 = 60
10 - 10 = 0
1000 : 1 = 1000
90+20=110
30*20 =600
10-10=0
1000:1=1000
~HT~
90 + 20 = 110
30 x 20 = 600
10 - 10 = 0
1000 : 1 = 1000
90 + 20 = 110
30 x 20 = 600
10 - 10 = 0
1000 : 1 = 1000
90+20=110
30x20=600
10-10=0
1000:1=1000
Lê Thành Vinh A