ответ:1) 281*32 2)179*12 3)236*27 4)89*12 5)510*30 6)768:2; 7)805:7 8)792:4 9)756:3 10)684:4.
Пошаговое объяснение:1) 2)
1)× 2 8 1
3 2
5 6 2
8 4 3
8 9 9 2
2)
× 1 7 9
1 2
3 5 8
1 7 9
2 1 4 8
3)× 2 3 6
2 7
1 6 5 2
4 7 2
6 3 7 2
4)
× 8 9
1 2
1 7 8
8 9
1 0 6 8
5)
× 5 1 0
3 0
1 5 3 0 0
6) 7 6 8 2
6 3 8 4 2 × 3 = 6
- 1 6 7 - 6 = 1
1 6 2 × 8 = 16
- 8 16 - 16 = 0
8 2 × 4 = 8
0
7)8 0 5 7
7 1 1 5 7 × 1 = 7
- 1 0 8 - 7 = 1
7 7 × 1 = 7
- 3 5 10 - 7 = 3
3 5 7 × 5 = 35
0 35 - 35 = 0
8)7 9 2 4
4 1 9 8 4 × 1 = 4
- 3 9 7 - 4 = 3
3 6 4 × 9 = 36
- 3 2 39 - 36 = 3
3 2 4 × 8 = 32
0 32 - 32 = 0
9)7 5 6 3
6 2 5 2 3 × 2 = 6
- 1 5 7 - 6 = 1
1 5 3 × 5 = 15
- 6 15 - 15 = 0
6 3 × 2 = 6
0 6 - 6 = 0
10) 6 8 4 4
4 1 7 1 4 × 1 = 4
- 2 8 6 - 4 = 2
2 8 4 × 7 = 28
- 4 28 - 28 = 0
4 4 × 1 = 4
0 4 - 4 = 0
2 7/9 * 15 = (2 * 9 + 7)/9 * 15 = 25/9 * 15 = (25*15)/9 = 125/3 = 41 2/3
28 * 1 3/4 = 28 * (1 * 4 + 3)/4 = 28 * 7/4 = (28*7)/4 = 7 * 7 = 49
1 3/5 * 2 1/2 = (1 * 5 + 3)/5 * (2 * 2 + 1)/2 = 8/5 * 5/2 = 8/2 = 4
3 1/3 * 3/5 = (3 * 3 + 1)/3 * 3/5 = 10/3 * 3/5 = 10/5 = 2
3 1/3 : 30 = (3 * 3 + 1)/3 * 1/30 = 10/3 * 1/30 = 1/(3*3) = 1/9
6 : 1 1/2 = 6 : (1 * 2 + 1)/2 = 6 : 3/2 = 6 * 2/3 = 2 * 2 = 4
1 3/4 : 10 1/2 = (1 * 4 + 3)/4 : (10 * 2 + 1)/2 = 7/4 : 21/2 =
= 7/4 * 2/21 = 1/(2*3) = 1/6
5 1/5 : 13/15 = (5 * 5 + 1)/5 * 15/13 = 26/5 * 15/13 = 2 * 3 = 6
