| Grade 1: Missing addend - sums with 18 The number of all possible operations is equal to 38 | |
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| Solve. | |
________ + 17 = 18 ________ + 6 = 18 ________ + 13 = 18 ________ + 15 = 18 ________ + 11 = 18 ________ + 4 = 18 ________ + 3 = 18 ________ + 1 = 18 ________ + 16 = 18 ________ + 14 = 18 ________ + 18 = 18 ________ + 5 = 18 ________ + 0 = 18 ________ + 12 = 18 ________ + 10 = 18 ________ + 8 = 18 ________ + 9 = 18 ________ + 7 = 18 ________ + 2 = 18 | 1 + ________ = 18 17 + ________ = 18 12 + ________ = 18 15 + ________ = 18 5 + ________ = 18 11 + ________ = 18 13 + ________ = 18 3 + ________ = 18 9 + ________ = 18 18 + ________ = 18 8 + ________ = 18 7 + ________ = 18 4 + ________ = 18 16 + ________ = 18 10 + ________ = 18 6 + ________ = 18 2 + ________ = 18 0 + ________ = 18 14 + ________ = 18 |
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| Grade 1: Missing addend - sums with 18 The number of all possible operations is equal to 38 | |
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| The Answer. | |
1 + 17 = 18 12 + 6 = 18 5 + 13 = 18 3 + 15 = 18 7 + 11 = 18 14 + 4 = 18 15 + 3 = 18 17 + 1 = 18 2 + 16 = 18 4 + 14 = 18 0 + 18 = 18 13 + 5 = 18 18 + 0 = 18 6 + 12 = 18 8 + 10 = 18 10 + 8 = 18 9 + 9 = 18 11 + 7 = 18 16 + 2 = 18 | 1 + 17 = 18 17 + 1 = 18 12 + 6 = 18 15 + 3 = 18 5 + 13 = 18 11 + 7 = 18 13 + 5 = 18 3 + 15 = 18 9 + 9 = 18 18 + 0 = 18 8 + 10 = 18 7 + 11 = 18 4 + 14 = 18 16 + 2 = 18 10 + 8 = 18 6 + 12 = 18 2 + 16 = 18 0 + 18 = 18 14 + 4 = 18 |
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