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Problem A.

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Let's add angles.

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Thirty degrees.

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Fifty degrees.

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Thirty plus fifty equals eighty.

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Eighty minus thirty equals fifty.

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Problem B.

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twenty-five degrees.

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forty degrees.

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twenty-five plus forty equals sixty-five.

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Problem C.

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sixty degrees.

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thirty-five degrees.

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sixty plus thirty-five equals ninety-five.

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Problem D.

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fifty-five degrees.

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twenty-five degrees.

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fifty-five plus twenty-five equals eighty.

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Problem E.

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one hundred degrees.

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Subtract forty-five degrees.

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one hundred minus forty-five equals fifty-five.

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Problem F.

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seventy degrees.

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fifty degrees.

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seventy plus fifty equals one hundred twenty.

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Problem G.

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one hundred twenty degrees.

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Subtract seventy degrees.

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one hundred twenty minus seventy equals fifty.