The seventh grade, the first volume of math problems. - Training Enrollment Network

The seventh grade, the first volume of math problems.

- 1/3 + 5 + 1/4 - 3 - 1/7 - 5 - 1/4 + 12 +6/7

=- 1/3 +(5 - 3 -5 + 12) + ( 1/4- 1/4) - 1/7 + 6/7

=- 1/3 + 9 +5/7

=9 + 5/7- 1/3

=9+ 15/2 1 - 7/2 1

=9 + 8/2 1

The answers are 9 in 0 and 265438+8.

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