Question

20. Add : -3.61 + 6.90 + (-4.98) + (-1.78) =
21. Subtract: -5 - (-4.1) - 1 =
22. Subtract: 1.1 - (-4.1) =
23. Subtract: -1.2-(-1.0) -4.1 =
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Answer 1

Answer:

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