№14. Вычисли: a) |-4|+|-5|; б) |-1.8| : |3/25|; в) |-5.6| - |-1|; г) |2.25| - |-1 3/4|; д) |-24.5| + |0|; е) |-3 8/9| - |-0.54|; ж) |8.2| - |-0.32|; з) |-7.12| : |-1/10|; и) |-6| - |-4.2| : |0.7|; к) |-1 1/4| * |-0.1| + |-0.125|; л) |-3| : |-7| - |-3.5| * |-0.6|; м) |-5/18| * |-9| - |-0.25| * |0|.

a) |-4|+|-5| = 4 + 5 = 9 б) |-1.8| : |3/25| = 1.8 : (3/25) = 1.8 * (25/3) = (18/10) * (25/3) = (6/10) * 25 = (3/5) * 25 = 15 в) |-5.6| - |-1| = 5.6 - 1 = 4.6 г) |2.25| - |-1 3/4| = 2.25 - 1.75 = 0.5 д) |-24.5| + |0| = 24.5 + 0 = 24.5 е) |-3 8/9| - |-0.54| = 3 8/9 - 0.54 = 3.888... - 0.54 = 3.34888... ж) |8.2| - |-0.32| = 8.2 - 0.32 = 7.88 з) |-7.12| : |-1/10| = 7.12 : (1/10) = 7.12 * 10 = 71.2 и) |-6| - |-4.2| : |0.7| = 6 - 4.2 : 0.7 = 6 - 6 = 0 к) |-1 1/4| * |-0.1| + |-0.125| = 1.25 * 0.1 + 0.125 = 0.125 + 0.125 = 0.25 л) |-3| : |-7| - |-3.5| * |-0.6| = 3 : 7 - 3.5 * 0.6 = 3/7 - 2.1 = 0.428... - 2.1 = -1.671... м) |-5/18| * |-9| - |-0.25| * |0| = (5/18) * 9 - 0.25 * 0 = (5/18) * 9 - 0 = 45/18 = 5/2 = 2.5