вычислите, пожалуйста.
а) (1 5/15 - 2 1/8) : (1 1/2 + 23/30)
б) (2 2/15 - 3 3/5) : (14/15 + 2/45)
а) (1 5/15 - 2 1/8) : (1 1/2 + 23/30)
б) (2 2/15 - 3 3/5) : (14/15 + 2/45)
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Answers & Comments
20/15-17/8=160/120-255/120= -95/120= -19/24
3/2+23/30=45/30+23/30=68/30=34/15
-19/24×15/34= -95/272
б) (2 2/15 - 3 3/5) : (14/15 + 2/45)
2 2/15-3 3/5=32/15-18/5=32/15-54/15= -22/15
14/15+2/45=42/45+2/45=44/45
-22/15×45/44= -3/2= -1 1/2-