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Answer:
True, false, true, false.
Step-by-step explanation:
1. Add 2.7 and 4.2 to get 6.9.
2. The least possible difference you can get is 10.2. (4.2+|-6|)
3. 2.7x4.2 (the greatest positive numbers) get you 11.34.
4. You divide 4.2 and -2/3, but it's only -0.7.