Answer:
To find the numbers that are 1.3 units away from 0.4 on a number line, we can add and subtract 1.3 from 0.4.
Adding 1.3 to 0.4:
0.4 + 1.3 = 1.7
Subtracting 1.3 from 0.4:
0.4 - 1.3 = -0.9
Therefore, the numbers that are 1.3 units away from 0.4 on a number line are 1.7 and -0.9
Explanation: