Adding mixed numbers with like denominators | Fractions | Pre-Algebra | Khan Academy

Think of a mixed numbers as a number AND a fraction. You can add numbers....you can add fractions with like denominators. Therefore, you can add mixed numbers! Watch.

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Хајде да саберемо ова два мешовита броја

2 и 5/13 + 7 и 6/13

И начин на који ја волим да замислим то у глави,

волим да раздојим мешовите бројеве на целобројну компоненту и разломљену компоненту

тако да можемо да запишемо 2 и 5/13 као,

2 + 5/13

и онда, можемо да напишемо да је то +,

онда 7 и 6/13 мошемо да напишемо као

+ 7 + 6/13

Дакле, све што сам урадио је да сам записао ово и

у суштини извукао, разбио сам мешовите бројеве на њихове целобројне делове и њихове разломљене делове

и оно што затим хоћу да урадим је да желим да саберем целобројне делове

тако да ових 2 + ових 7, дакле, урадићу 2 + 7 овде...

Сабраћу ове и на то ћу додати разломљене делове

Да бих то урадио, сабраћу 5/13

и 6/13

Значи, када саберемо целобројне делове

2 + 7 је 9

и разломљени делови, већ имају исти именилац

5/13 + 6/13

добићете 11/13, 5 + 6 је 11

Значи, добијате 9 + 11/13

Па, то једноставно иста ствар као и 9 и 11/13

и завршили смо!