Answer:

C.458.81

Step-by-step explanation:

first,add 23.456 to 90.354 and the answer you will get is 113.81

last,add 113.81 to 345 and you will get 458.81

solution:23.456 113.81

+ 90.354. +345_

113.81. 458.81

Answer:

The answer is C. 458.81

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