Equations
Unfold
Math OP
Fold
Linear algebra
Unfold
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: 4 questions will be solved this time.Among them
☆3 arithmetic calculations
☆1 integer calculations
[1/4 Integer column vertical calculation]
Question type: Integer multiplication
Original question: 12345678987654321×9
Solution:
12345678987654321×9 = 111111110888888889
Column vertical calculation:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | ||||||
| ✖ | 9 | |||||||||||||||||||||
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | |||||
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | |||||
[2/4 Formula]
Work: Calculate the value of equation 111111×888888+111112×111113 .
Question type: Mathematical calculation
Solution:
111111×888888+111112×111113
=98765234568+111112×111113
=98765234568+12345987656
=111111222224
Answer:111111×888888+111112×111113=111111222224
[3/4 Formula]
Work: Calculate the value of equation 20072007×20072006-20072008×20072005 .
Question type: Mathematical calculation
Solution:
20072007×20072006-20072008×20072005
=402885444936042-20072008×20072005
=402885444936042-402885444936040
=2
Answer:20072007×20072006-20072008×20072005=2
[4/4 Formula]
Work: Calculate the value of equation A(2009,2)+A(2007,2) .
Question type: Mathematical calculation
Solution:
A(2009,2)+A(2007,2)
=4034072+A(2007,2)
=4034072+4026042
=8060114
Answer:A(2009,2)+A(2007,2)=8060114