Addition
0+0
0
The number that comes before 10
9
This shape has three sides
triangle
10 + __ = 10
0
The number that comes after 10?
11
3+2
The number that comes before 15
14
This shape has four sides that are all the same size.
square
5 + __ = 10
6
The number that comes after 25?
26
1+9
10
The number that comes before 20
19
This shape two long sides and two short sides
Rectangle
6 + __ = 10
4
The number that comes after 39?
40
10+10
20
The number that comes before 50
49
This shape has five sides
Pentagon
1 + __ = 10
9
The number that comes after 75
76
100+1
101
The number that comes before 100
99
This shape has eight sides
2 + __ = 10
8
The number that comes after 99?
100