Sarah was adding numbers on a number line. she started on 69 and then he added 24. sarah wrote that the answer was 83. is sarah's answer reasonable?
a. no, it is not reasonable because if you round the numbers to 70 and 25 the answer is 95. so the answer to sarah's question should be just a bit less than 95.
b. yes, it is reasonable because if you round the numbers to 60 and 20 the answer will be 80. so the answer to sarah's question should be a bit more than 80.
c. no, it is not reasonable because if you round the numbers to 70 and 30 the answer will be 100. so the answer to sarah's question should be very close to 100.