Addition
21 + 7 = ?
28
12 - 5 = ?
7
What is 2 quarters worth?
50 cents
I have 0 edges, 0 corners, and 0 faces.
Sphere
35 + 13 = ?
48
25 - 12 = ?
13
3 quarters, 2 dimes, 1 nickel is worth...
$1
I have 8 edges, 12 corners, and 6 equal faces
cube
102 + 43 + ?
145
67 - 43 = ?
24
7 quarters is worth
$1.75
I have 8 edges, 5 faces, and 5 corners.
pyramid
234 + 345 = ?
579
134 - 67 = ?
67
76 cents - 23 cents = ?
53 cents
I have 0 edges, 0 corners, and 2 faces.
Cylinder
459 + 345 = ?
804
256 - 138 = ?
118
$1.56 - 75 cents = ?
81 cents
I have 12 edges, 8 corners, and 6 faces.
Rectangular Prism