а)
0,25 * 3/5 = 25/100 * 3/5 = 1/4 * 3/5 = 3/20 (или 0,15),
б)
0,125 * 5/8 = 125/1000 * 5/8 = 1/8 * 5/8 = 5/64,
в)
9/65 * 5/8 * 0,64 = 9/65 * 5/8 * 64/100 = 9/65 * 5/8 * 16/25 = 18/325,
г)
13/44 * 6,5 * 11/130 = 13/44 * 65/10 * 11/130 = 13/44 * 13/2 * 11/130 = 13/80 (или 0,1625)
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Answers & Comments
а)
0,25 * 3/5 = 25/100 * 3/5 = 1/4 * 3/5 = 3/20 (или 0,15),
б)
0,125 * 5/8 = 125/1000 * 5/8 = 1/8 * 5/8 = 5/64,
в)
9/65 * 5/8 * 0,64 = 9/65 * 5/8 * 64/100 = 9/65 * 5/8 * 16/25 = 18/325,
г)
13/44 * 6,5 * 11/130 = 13/44 * 65/10 * 11/130 = 13/44 * 13/2 * 11/130 = 13/80 (или 0,1625)