Calculate

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers.
Area.png
a) 52 =
b) 3 2 =
c) 43 =
d) 53 =
e) 102 =
f) 92 =
g) 72 =
h) 62 =
i) 33 =
j) 23 =