C. Solve the following. Write the correct answer on the space provided beforeeach number.15. The sum of 23.456, 90.354, and 345.116. 234.45 added to the difference of 89 and 23.76517. Increase 234.57 by the difference of 5.23 and 2.678.18. Take away 45.32 from 890.45.19. Subtract 68.501 from the sum of 21.54 and 80.27,20. The sum of the difference of 56.78 and 19.452, and 14.2321. Reduce the sum of 78.451 and 69.354 by the sum of the 12.03and 16.54.22. Increase 27.4578 by 5.783.23. Take away 28.567 from the sum of 19.54 and 27.6924. Deduct 15.729 from the sum of 26.84 and 4.5.25. Add 15.729 to the difference of 26.84 and 4.5.