Why it happens:4 1⁄10 and 41⁄10 are the same number written two ways, so they sit at the same place on the number line. Only 4⁄10 and 41 1⁄10 are different.
Tip: the position of the ‘41’ matters a lot — 41 tenths is a little more than 4, but 41 units and a tenth is ten times bigger.
Q2.
Sonu is measuring some of his body parts. The length of Sonu’s lower arm is 2 7/10 units, and that of his upper arm is 3 6/10 units. What is the total length of his arm?
Answer
Add the units to the units and the tenths to the tenths.
(2 + 3) units and (7 + 6) tenths = 5 units and 13 tenths 13 tenths = 1 unit and 3 tenths = 5 + 1 units and 3 tenths = 6 3⁄10 units