KORRUTAMISSEADUSED
1. Arvuta peast, kasutades arvutamise lihtsustamiseks korrutamise
vahetuvusseadust.
| 2 × 7 × 15 × 4 = 8 ×29 ×5 =
15 × 8 ×25 ×2 =
4 ×34 ×5 =
8 × 6 ×500 ×3 = |
25 × 8 ×4 ×6 = 9 ×8 ×5 =
4 × 6 ×35 =
9 ×4 × 150 =
6 × 4 ×15 × 200 = |
5 × 7 ×40 = 7 × 6 × 15 =
3 ×50 ×28 ×2 =
17 × 4 ×250 =
8 × 3 × 45 = |
2. Kuidas arvutad, kasutades arvutamise lihtsustamiseks korrutamise jaotuvusseadust?
| 7 × 405 =398 ×8 =6 ×96 = ( 47 - 5 ) ×3 =
5 × 202 =
4 × 697 = |
5 × ( 50 + 7 ) =
( 45 + 8 ) × 2 =3 × ( 259 - 54 ) =
4 × ( 125 + 36 ) = |
3. Kasuta korrutamise ühenduvusseadust.
| 4 × ( 25 × 7 ) = ( 8 × 150 0 × 6 =
14 × ( 7 × 5 ) =
23 × ( 3 × 4 ) =
|
(5 × 3 ) × 47 = 55 × ( 12 × 5 ) =
72 × ( 2 × 7 ) =
105 × ( 4 × 8 )
|
7 s × 8 = 13 × 4 x =
45 r × 6 =
69 x × 4 =
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