Addition and Subtraction of Angles
Grade Four · Lesson 30 · 2:33 · Animated lesson with English narration
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Transcript
Problem A. Let's add angles. Thirty degrees. Fifty degrees. Thirty plus fifty equals eighty. Eighty minus thirty equals fifty. Problem B. twenty-five degrees. forty degrees.
twenty-five plus forty equals sixty-five. Problem C. sixty degrees. thirty-five degrees. sixty plus thirty-five equals ninety-five. Problem D. fifty-five degrees. twenty-five degrees.
fifty-five plus twenty-five equals eighty. Problem E. one hundred degrees. Subtract forty-five degrees. one hundred minus forty-five equals fifty-five. Problem F. seventy degrees. fifty degrees.
seventy plus fifty equals one hundred twenty. Problem G. one hundred twenty degrees. Subtract seventy degrees. one hundred twenty minus seventy equals fifty.
Transcript generated from the lesson narration.
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