1,75 - (7/15 : 1 13/15 + 3/8) = 1 1/8 (в обыкновенных дробях)
1) 7/15 : 1 13/15 = 7/15 : 28/15 = 7/15 * 15/28 = 1/4
2) 1/4 + 3/8 = 2/8 + 3/8 = 5/8
3) 1,75 - 5/8 = 1 3/4 - 5/8 = 1 6/8 - 5/8 = 1 1/8
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1,75 - (7/15 : 1 13/15 + 3/8) = 1,125 (в десятичных дробях)
1) 7/15 : 1 13/15 = 7/15 * 15/28 = 1/4 = 0,25
2) 0,25 + 3/8 = 0,25 + 0,375 = 0,625
3) 1,75 - 0,625 = 1,125