9514 1404 393
Answer:
(a) -4 1/12
(b) -7/12
Step-by-step explanation:
We can convert these numbers to ones with a denominator of 12. This will facilitate the arithmetic.
2 1/3 = (6+1)/3 = 7/3 = 28/12
1 3/4 = (4 +3)/4 = 7/4 = 21/12
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Then the sum and difference are ...
(a) -28/12 -21/12 = -49/12 = -4 1/12
(b) -28/12 +21/12 = -7/12
