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Addition and subtraction

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Calculate:

14 + F = 40
A =
A =


B + 40 = 56
B =
B =


52 - C = 9
C = -
C =


D - 66 = 4
D =
D =


E + 26 = 76
E =
E =


14 + F = 90
F =
F =


G - 23 = 65
G =
G =


H + 160 = 300
H =
H =


248 + I = 350
I =
I =


J - 500 = 8
J =
J =


240 - K = 90
K =
K =


500 - L = 200
L =
L =


565 - M = 510
M =
M =


N - 500 = 100
N =
N =