<span>if mixed number: </span>

if improper fraction then:
Answer:
interior angle=5&3 and4&6
exterior angle=5&2,6&1,3&8,4&7
<span> allows you to </span>do<span> repeated addition quickly and efficiently</span>
B. Because the divisor, 4.2, has only value in the ones and tenths places, so we only have to multiply by 10 to get to 42, which is the whole number you need.
Sorry if my handwriting sloppy.
I showed all of it step by step.