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Answer:
There are 320 elementary students are enrolled.
Solution:
Convert 1/4 and 1/8 in to a decimal and add them together like the procedure below:
Converting 1/4 and 1/8:
1/4: 1 ÷ 4 = 0.25
1/8: 1 ÷ 8 = 0.125
Adding 0.25 and 0.125:
0.25 + 0.125 = 0.375
Multiply 320 and 0.375:
320 x 0.375 = 192
Substract 512 and 192:
512 - 192 = 320
Answer: 320 elementary students are enrolled.