MATRICES
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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4
Check
Across:
1.
A + O = O + A = A
2.
A′ = – A
4.
AB = BA = I
Down:
1.
(A + B) + C = A + (B + C).
3.
A + B = B + A
OK