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1. what is the difference when (-6) is subtracted from (-3)?

2. If (-12) is one of the factors of -180, what is the other factor?

3. After John spends 1/4 of his salary on food and 2/3 of what remains on clothes, what part of his original salary does be have left?

4. Arrange the following fractions from least to greatest: 1/2, 8/15, 9/19

5. 0.7 deceased by 0.02