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1. The number -10 is an element of which set of numbers?
N Z N U {0} |
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2. How much is 6b - b? 4 5b -b |
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3. How much is b - (-4b)? 2b 5b -4b |
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4. How much is (-3b) * (-1)? 0 3b -3b |
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5. How much is 50ab - 20ab? 0 30 30ab |
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6. How much is 20ab * (-3c) -60abc -60 60abc |
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7. How much is 7ab + 2a*(-3b)? 9a 10ab ab |