bonjour
7/9 - 5/12
= 28/36 - 15/36
= 13/36
1/3 + 4/3 : 16/8
= 1/3 + 4/3 * 8/16
= 1/3 + 32/48
= 16/48 + 32/48
= 48/48 = 1
- 16/27 * - 45 /-32
= - 720/864
= - 5/6
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bonjour
7/9 - 5/12
= 28/36 - 15/36
= 13/36
1/3 + 4/3 : 16/8
= 1/3 + 4/3 * 8/16
= 1/3 + 32/48
= 16/48 + 32/48
= 48/48 = 1
- 16/27 * - 45 /-32
= - 720/864
= - 5/6