Ответ:
) 8,1 * 1 9/36 = 81/10 * 45/36 = 9/2 * 9/4 = 81/8 = 10 1/8
2) -1,4 : 4 = -14/10 * 1/4 = -7/10 * 1/2 = -7/20
3) 10 1/8 + (-7/20) = 10 1/8 - 7/20 = 10 5/40 - 14/40 = 9 45/40 -'14/40 = 9 29/40
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Ответ:
) 8,1 * 1 9/36 = 81/10 * 45/36 = 9/2 * 9/4 = 81/8 = 10 1/8
2) -1,4 : 4 = -14/10 * 1/4 = -7/10 * 1/2 = -7/20
3) 10 1/8 + (-7/20) = 10 1/8 - 7/20 = 10 5/40 - 14/40 = 9 45/40 -'14/40 = 9 29/40