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5. klase
Naturāli skaitļi. Vieni, desmiti, simti
Reizināšana un dalīšana
6.
Reizrēķins
Teorija
1
⋅
1
=
1
1
⋅
2
=
2
1
⋅
3
=
3
1
⋅
4
=
4
1
⋅
5
=
5
1
⋅
6
=
6
1
⋅
7
=
7
1
⋅
8
=
8
1
⋅
9
=
9
1
⋅
10
=
10
2
⋅
1
=
2
2
⋅
2
=
4
2
⋅
3
=
6
2
⋅
4
=
8
2
⋅
5
=
10
2
⋅
6
=
12
2
⋅
7
=
14
2
⋅
8
=
16
2
⋅
9
=
18
2
⋅
10
=
20
3
⋅
1
=
3
3
⋅
2
=
6
3
⋅
3
=
9
3
⋅
4
=
12
3
⋅
5
=
15
3
⋅
6
=
18
3
⋅
7
=
21
3
⋅
8
=
24
3
⋅
9
=
27
3
⋅
10
=
30
4
⋅
1
=
4
4
⋅
2
=
8
4
⋅
3
=
12
4
⋅
4
=
16
4
⋅
5
=
20
4
⋅
6
=
24
4
⋅
7
=
28
4
⋅
8
=
32
4
⋅
9
=
36
4
⋅
10
=
40
5
⋅
1
=
5
5
⋅
2
=
10
5
⋅
3
=
15
5
⋅
4
=
20
5
⋅
5
=
25
5
⋅
6
=
30
5
⋅
7
=
35
5
⋅
8
=
40
5
⋅
9
=
45
5
⋅
10
=
50
6
⋅
1
=
6
6
⋅
2
=
12
6
⋅
3
=
18
6
⋅
4
=
24
6
⋅
5
=
30
6
⋅
6
=
36
6
⋅
7
=
42
6
⋅
8
=
48
6
⋅
9
=
54
6
⋅
10
=
60
7
⋅
1
=
7
7
⋅
2
=
14
7
⋅
3
=
21
7
⋅
4
=
28
7
⋅
5
=
35
7
⋅
6
=
42
7
⋅
7
=
49
7
⋅
8
=
56
7
⋅
9
=
63
7
⋅
10
=
70
8
⋅
1
=
8
8
⋅
2
=
16
8
⋅
3
=
24
8
⋅
4
=
32
8
⋅
5
=
40
8
⋅
6
=
48
8
⋅
7
=
56
8
⋅
8
=
64
8
⋅
9
=
72
8
⋅
10
=
80
9
⋅
1
=
9
9
⋅
2
=
18
9
⋅
3
=
27
9
⋅
4
=
36
9
⋅
5
=
45
9
⋅
6
=
54
9
⋅
7
=
63
9
⋅
8
=
72
9
⋅
9
=
81
9
⋅
10
=
90
10
⋅
1
=
10
10
⋅
2
=
20
10
⋅
3
=
30
10
⋅
4
=
40
10
⋅
5
=
50
10
⋅
6
=
60
10
⋅
7
=
70
10
⋅
8
=
80
10
⋅
9
=
90
10
⋅
10
=
100
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