2 tens + 1 ten =
3 tens
30 + 2=
32
16 + 8 =
24
2 tens - 2 tens=
0 tens
10 + _______ = 20
20 - 10= __________
10
4 tens + 4 tens=
8 tens
42 +4=
46
45 +7=
52
8 tens - 3 tens =
5 tens
40 + _________ = 60
60 - 40 = __________
20
7 tens + 2 tens = 70 + 20=
9 tens 90
62 + 4=
66
86 + 5 =
91
9 tens - 5 tens = 90 - 50=
4 tens 40
50 + __________ = 90
90 - 50 = __________
40
5 tens + 3 tens= 50+30=
8 tens 80
82 + 5 =
87
95 +7
102
9 tens 90
- 2 tens - 20
___________ ---------
7 tens 70
70 - 60= ____________
________ + ________ = ____________
10
60 + 10= 70
6 tens + 4 tens 60 +40 =
10 tens 100
73 + 7 =
80
56 + 9 =
65
9 tens 90
- 3 tens - 30
------------- -----------
6 tens 60
40 - 20 = _________
_________ + _________ = __________
20
20 + 20 = 40