Вычислите, предварительно раскрыв скобки:
1) -(4,6+9,81+1,27)+(5,73-1,81+3)
2)4,92+54,09-(-3,81+78-54,09)
3)-(-1/5+6/25-8/25)-(-0,39+0,26)
1) -(4,6+9,81+1,27)+(5,73-1,81+3)
2)4,92+54,09-(-3,81+78-54,09)
3)-(-1/5+6/25-8/25)-(-0,39+0,26)
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Answers & Comments
2) 4,92 + 54,09 - (-3,81 + 78 - 54,09) = 4,92 + 54,09 - 20,1 = 38,91
3) - (-1/5 + 6/25 - 8/25) - (-0,39 + 0,26) = - (-5+6-8)/25 - (-0,13) = 7+0,13 = 7,13