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Mathematical calculation：
Enter the mathematical formula directly and click the "Next" button to get the calculation answer.
It supports mathematical functions (including trigonometric functions).
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: 3 questions will be solved this time.Among them
☆2 arithmetic calculations
☆1 integer calculations
[1/3 Formula]
Work: Calculate the value of equation 19991999×19991998-19992000×19991997 .
Question type: Mathematical calculation
Solution:
19991999×19991998-19992000×19991997
=399680004024002-19992000×19991997
=399680004024002-399680004024000
=2
Answer:19991999×19991998-19992000×19991997=2
[2/3 Formula]
Work: Calculate the value of equation (129+1419+14319+143319+1433319+14333319)÷43 .
Question type: Mathematical calculation
Solution:
(129+1419+14319+143319+1433319+14333319)÷43
=15925824÷43
=370368
Answer:(129+1419+14319+143319+1433319+14333319)÷43=370368
[3/3 Integer column vertical calculation]
Question type: Integer multiplication
Original question: 12345679012345679×81
Solution:
12345679012345679×81 = 999999999999999999
Column vertical calculation:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | |||||||
| ✖ | 8 | 1 | |||||||||||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | |||||||
| 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 0 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | |||||||
| 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | ||||||