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Enter the mathematical formula directly and click the "Next" button to get the calculation answer.
It supports mathematical functions (including trigonometric functions).
Current location：Mathematical operation > History of Mathematical Computation > Answer
Overview: 1 questions will be solved this time.Among them
☆1 arithmetic calculations
[1/1 Formula]
Work: Calculate the value of equation 20-19-18+17+16-15-14+13+12-11-10+9+8-7-6+5 .
Question type: Mathematical calculation
Solution:
20-19-18+17+16-15-14+13+12-11-10+9+8-7-6+5
=1-18+17+16-15-14+13+12-11-10+9+8-7-6+5
=-17+17+16-15-14+13+12-11-10+9+8-7-6+5
=0+16-15-14+13+12-11-10+9+8-7-6+5
=16-15-14+13+12-11-10+9+8-7-6+5
=1-14+13+12-11-10+9+8-7-6+5
=-13+13+12-11-10+9+8-7-6+5
=0+12-11-10+9+8-7-6+5
=12-11-10+9+8-7-6+5
=1-10+9+8-7-6+5
=-9+9+8-7-6+5
=0+8-7-6+5
=8-7-6+5
=1-6+5
=-5+5
=0
Answer:20-19-18+17+16-15-14+13+12-11-10+9+8-7-6+5=0
☆1 arithmetic calculations
[1/1 Formula]
Work: Calculate the value of equation 20-19-18+17+16-15-14+13+12-11-10+9+8-7-6+5 .
Question type: Mathematical calculation
Solution:
20-19-18+17+16-15-14+13+12-11-10+9+8-7-6+5
=1-18+17+16-15-14+13+12-11-10+9+8-7-6+5
=-17+17+16-15-14+13+12-11-10+9+8-7-6+5
=0+16-15-14+13+12-11-10+9+8-7-6+5
=16-15-14+13+12-11-10+9+8-7-6+5
=1-14+13+12-11-10+9+8-7-6+5
=-13+13+12-11-10+9+8-7-6+5
=0+12-11-10+9+8-7-6+5
=12-11-10+9+8-7-6+5
=1-10+9+8-7-6+5
=-9+9+8-7-6+5
=0+8-7-6+5
=8-7-6+5
=1-6+5
=-5+5
=0
Answer:20-19-18+17+16-15-14+13+12-11-10+9+8-7-6+5=0