(13а-9а+7-а)×0,3
задание 4
8(2х-4,5) -6(5,2 - х) +0,9
задание 5: распределительным свойством
(-1,2:0,6×(-0,3)) : (-0,9 × 1,5-0,3×1,5)
помогите плиз​
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