6400:800 64-64 00 переписываем просто в ответ в итоге 800(ответ)
1264:16 126-112 144-144 в итоге 78(ответ)
А) 9/14- 3/7+ 15/27= 9/14-6/14+15/28= 18/28-12/28+15/28= 21/28
б) 7/12-5/6+13/24=7/12-10/12+13/24= 14/24 - 20/24 + 13/24= 16/24=8/18=4/9
в) 13/18 - 29/45+8/15= 65/90-58/90+48/90=7/90+48/90= 55/90=11/18
г)9/16+7/24-3/8= 9/16+ 7/24- 6/16= 27/48+ 14/48-18/48=23/48
д) 2/5+ 4/15-5/9= 6/15+4/15-5/9= 18/45+12/45-25/45= 5/45= 1/9
е) 37/42-17/24+5/7=72/84-51/84+60/84=21/84+60/84=81/84=27/28
<span>0.5 дм^2 так как 1дм^2 = 100 см^2</span>
1052.
1) 8 1/5 + 5 1/6 - 3 1/5 = 8 6/30 + 5 5/30 - 3 6/30 = 10 5/30 = 10 1/6
2) 8 1/8 + 1 2/3 - 3 1/4 = 8 3/24 + 1 16/24 - 3 6/24 = 6 13/24
3) 6 1/4 - 2 5/7 + 6 3/14 = 6 7/28 - 2 20/28 + 6 6/28 = 5 35/28 - 2 20/28 + 6 6/28 = 9 21/28 = 9 3/4
4) 5 2/3 + 2 1/4 - 1 1/5 = 5 40/60 + 2 15/60 - 1 12/60 = 6 43/60
1053.
1) 7 - 3/5 + 2 7/9 = 6 5/5 - 3/5 + 2 7/9 = 6 45/45 - 27/45 + 2 35/45 = 8 53/45 = 9 8/45
2) 5 2/7 - 1/3 + 6 = 5 6/21 - 7/21 + 126/21 = 4 27/21 - 7/21 + 126/21 = 4 146/21 = 10 20/21
3) 9 + 1 3/4 - 2/5 = 8 4/4 + 1 3/4 - 2/5 = 8 20/20 + 1 15/20 - 8/20 = 9 27/20 = 10 7/20
4) 3 5/12 - 4/5 + 31/60 = 3 25/60 - 48/60 + 31/60 = 2 85/60 - 48/60 + 31/60 = 2 68/60 = 3 8/60 = 3 2/15
1) 25/100*32,5=8,125 (га) вспахал в первый день
2) 84/28*100=300 (стр) в детективе
3) 60-12=48 (пир) осталось