Помогите даю 35 баллов
Ответы
Ответ:
задание 1
а)¼+⅗= 5/20+12/20=32/20=8/5= 1⅗
б)⅚+⅜=20/24+9/24=29/24= 1 5/24
в)19/21-11/15= 85/105- 77/105=8/105
г)3 2/7+5 3/14= 3 4/14+ 5 3/14= 8 7/14= 8½=8.5
д)6- 5⅝= ⅜
е)6 3/12-11/15= 6 15/60- 44/60= 5 31/60
Объяснение:
задание 2
а)¾*⅗=3/20
б)11/12*8/9=11/3*2/9= 22/27
в)1 2/7*1¼= 9/7*5/4= 45/28= 1 17/28
г)2¼:27= 9/4:27= 9/4* 1/27=¼*⅓=1/12
д)⅗:9/25= ⅗*25/9=5/3=1⅔
е)8:⅘= 8* 5/4= 2*5=10
Задание 3
а)17,2+2.8= 20
б)10,273-5,49=10,273-5,490=4,783
в)39.3-10,34= 39,30-10,34=28,96
г)12,3-1.08= 12,30-1.08=11.22
д)43+9,15=52,15
е)907-70.4=836.6
1.
1/4 + 3/5 = 5/20 + 12/20 = 17/20,
5/6 + 3/8 = 20/24 + 9/24 = 29/24 = 1 5/24,
19/21 - 11/15 = 95/105 - 77/105 = 18/105 = 6/35,
3 2/7 + 5 3/14 = 3 4/14 + 5 3/14 = 8 7/14 = 8 1/2,
6 - 5 5/8 = 5 8/8 - 5 5/8 = 3/8,
6 3/12 - 11/15 = 6 15/60 - 44/60 = 5 75/60 - 44/60 = 5 31/60,
2.
3/4 * 3/5 = 9/20,
11/12 * 8/9 = 88/108 = 22/27,
1 2/7 * 1 1/4 = 9/7 * 5/4 = 45/28 = 1 17/28,
2 1/7 : 27 = 15/7 : 27 = 15/7 * 1/27 = 5/63,
3/5 : 9/25 = 3/5 * 25/9 = 5/3 = 1 2/3,
8 : 4/5 = 8/1 * 5/4 = 10,
3.
17,2 + 2,8 = 20,
10,273 - 5,49 = 4,783,
39,3 - 10,34 = 28,96,
12,3 - 1,08 = 11,22,
43 + 9,15 = 52,15,
907 - 70,4 = 836,6