1、153°39'+25°40'38" 2、90°-37°24‘38” 3、25°53’8“×5 4、15°20‘36
1.153°39'+25°40'38"=179°19‘38“
2.90°-37°24‘38”=52°35’22”
3.25°53’8“×5=129°25‘40“
4.15°20’36”
RELATED INFORMATIONS
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- 9. What is the square of 225-x = 169 - (196-28x + x square) x equal to?
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- 19. Additional questions: write 2000 numbers on the blackboard: 1, 2, 3 , 2000, it is allowed to erase two numbers a and B (a ≥ b) each time and write the three numbers A-B, AB and ab (that is, AB writes twice). After 8000 times of doing so, 10000 numbers are obtained. Q: can these 10000 numbers all be less than 500?
- 20. Mr. Wang wrote three integers 2,4,8 on the blackboard. Then he erased a number and added a number, which is more than the sum of the two numbers on the blackboard. For example, he erased 4 and added a number 2 + 8 + 1 = 11. At this time, the number on the blackboard is 2,8,11?