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 =