The length 4.221 cm is added to 0.01 cm. The appropriately rounded sum is
A) 4.22 cm.
B) 4.231 cm.
C) 4.23 cm.
D) 4.2 cm.
E) 4.21 cm.

Question

Quizplus · Accepted Answer

When adding 4.221 cm and 0.01 cm, we need to round the answer to the nearest hundredth since both numbers have two decimal places. 
Adding them results in 4.231 cm, and since the hundredths place digit (3) is closer to 2 than to 4, rounding to the nearest hundredth gives us 4.23 cm as the appropriately rounded sum. The correct choice is C.

The Length 4