1 / 2 1 / 3 1 / 4 1 / 6 = 7 / 12, fill in the appropriate operation symbols or brackets to make the equation true

1 / 2 1 / 3 1 / 4 1 / 6 = 7 / 12, fill in the appropriate operation symbols or brackets to make the equation true

1/2　* 1/3　+ 1/4　+ 1/6=7/12
1/2-1/3+1/4+1/6=7/12

4 / 5 × 2.5 × 12.5 × 4 / 25 (simple calculation)
Another question: what is the product of the sum of 5 / 8 and 1 / 2 multiplied by their difference?
(list calculation)

It can be easily calculated (16.25-13 and 3 / 4) △ 1 and 1 / 11 + 1 / 12)
It can be easily calculated
(16.25-13 and 3 / 4) △ 1 and 11 / 1 + 12 / 11 × 3 and 2 / 1 = ()

(16.25-13 and 3 / 4) △ 1 and 11 / 1 + 12 / 11 × 3 and 2 / 1
=(16:1-13:3) △ 11:12 + 12:11 × 3:1
=1 / 2 x 11 / 2 + 11 / 12 x 3 / 2
=11x of 12 (2 and 1 of 2 + 3 and 1 of 2)
=11x6 / 12
=11 / 2
=Five and one in two

(25 + 3 / 4) △ 1 / 4 + 1 / 4 is simple and fast

=25 / 1 / 4 + 3 / 4 + 1 / 4
=100 + 3 + 1 / 4
=103 and 1 / 4