выполните действия:
а) 9_5/19 - 7_7/19 + 4_15/19;
б) 5_3/28 + 6_25/28 - 7_9/28;
в) 14_5/29 - (5_21/29 + 4_9/29)
а) 9_5/19 - 7_7/19 + 4_15/19;
б) 5_3/28 + 6_25/28 - 7_9/28;
в) 14_5/29 - (5_21/29 + 4_9/29)
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а) 9_5/19 - 7_7/19 + 4_15/19=
= 8 24/19 - 7_7/19 + 4_15/19=
=1 17/19+4 15/19=5 32/19=6 13/19
б) 5_3/28 + 6_25/28 - 7_9/28=
=11 28/28-7 9/28=4 19/28
в) 14_5/29 - (5_21/29 + 4_9/29)=
=14_5/29 -9 30/29=14_5/29 -10 1/29=
=4 4/29