Plus or Minus: Arithmetic Puzzles (Book 2) - Softcover

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Plus or Minus is a game to help children master the arithmetic skills of addition and subtraction. Numbers are arranged in a 5 x 5 grid. The columns add up to the answers at the bottom, and the rows add up to the answers on the right. The bottom row, the right-hand column, and the diagonal all add up to the answer in the bottom right-hand corner, which is left blank. Children must place a plus or a minus sign in front of each number to make everything add up correctly.

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