Take off formula calculation (those that can be simplified should be simplified) ① (1 / 27-1 / 36) △ 1 / 9 ② 8 / 23-9 △ 5 / 6 × 3 / 16

Take off formula calculation (those that can be simplified should be simplified) ① (1 / 27-1 / 36) △ 1 / 9 ② 8 / 23-9 △ 5 / 6 × 3 / 16

① (1 / 27-1 / 36) △ 1 / 9
= (1 / 27-1 / 36) × 9
= 1 / 3-1 / 4
= 1 / 12
② 8 / 23-9 / 6 × 3 / 16
= 8 of 23-9 × (6 of 5) × (3 of 16)
=23-5
=18