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Numarul 7supra 15 *(-5supra28):8/21

Răspuns :

Mihaelap
7/15 * (- 5/28) : 8/21 = 
- 1/12 * 21/8 =
- 7/32
Slavitescudora
7/15×-5/28:8/21 = -35/420:8/21 = -35/420×21/8 = -735/3360 (simplificam prin 15) = -49/224 (simplificam prin 7) = -7/32

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