Question

упростить вырожения раскрывая скобки по боразцу​

Answer 1

в) = 5/12 + 1 1/2 - 5/12 = (5/12 - 5/12) + 1 1/2 = 1 1/2;

г) = 2 - 2/5 + 7 1/2 = (2 + 7 1/2) - 2/5 = 9 5/10 - 4/10 = 9 1/10;

д) = 4 2/7 - 7 1/2 - 4 2/7 = (4 2/7 - 4 2/7) - 7 1/2 = - 7 1/2;

е) = 9 7/9 - 2 1/2 + 2/9 = (9 7/9 + 2/9) - 2 1/2 = 10 - 2 1/2 = 7 1/2.

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Пояснения:

г) 1/2 = 5/10 - доп.множ. 5

2/5 = 4/10 - доп.множ. 2