1) = - 8,7 - (- 2,3) = - 6,4
2) = - 21/8 : 7/4 = - 21/8 * 4/7 = - 84/56 = - 3/2 = -1 1/2
3) -1 1/2 + (-6,4) = -1 1/2 + (-6 4/10) = - 7,9 или (-7 9/10)
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Answers & Comments
1) = - 8,7 - (- 2,3) = - 6,4
2) = - 21/8 : 7/4 = - 21/8 * 4/7 = - 84/56 = - 3/2 = -1 1/2
3) -1 1/2 + (-6,4) = -1 1/2 + (-6 4/10) = - 7,9 или (-7 9/10)