§ 4. Звичайні дроби » 848

Обчисліть: 1) 714/(15 ) + 21/15 = 915/15 = 10 2) 924/27 + 1213/27 = 2137/27 = 2210/27 3) 1 – 12/19 = 19/19 – 12/19 = 7/19 4) 8 – 36/15 = 715/15 – 36/15 = 49/15 5) 12 – 116/11 = 1111/11 – 116/11 = 5/11 6) 163/13 – 68/13 = 1516/13 – 68/13 = 98/13 7) 134/9 – 28/9 = 1213/9 – 28/9 = 105/9 8) 107/16 – 412/16 = 923/16 – 412/16 = 511/16 9) 2949/53 – 849/53 = 21