suzy was adding numbers on a number line. she started at –2 and then she added –3. she wrote that her answer was +5.
is suzy's answer reasonable?
a.
yes, it is reasonable because if you add two numbers, you will get a number that is greater than either of the two numbers.
b.
no, it is not reasonable because if you start at –2, you would move 3 places to the left and get –5.
c.
no, it is not reasonable because if you start at –2, you would move 3 places to the right and get +1.