Adding 10
10 + 5 =
15
10 - 10 =
0
70 - 30 =
40
10 + 20 =
30
30 - 10 =
20
40 - 20= ?
Think 20 + ___ = 40
So, 40 - 20 = ____
Think 20 + 20 = 40
So, 40 - 20 = 20
66 + 10 =
76
53 - 10 =
43
One box has 40 magnetic tiles. Another box has the same number of magnetic tiles. How many tiles are there in all?
40 + 40 = 80
80 magnetic tiles
72 + 10 =
82
69 - 10 =
59
62 + 20 =
82
10 +81 =
91
84 - 10 =
74
37 - 10 =
27
88 + 10 =
98
97 - 10 =
87
You have 26 trading cards and buy 40 more. Your friend has 65 trading cards. Who has more trading cards?
Compare ____ < or > _______ Who has more cards?
26 + 40 = 66
66 > 65
You