Obliczamy:

$3\cdot 10=30$  

$5\cdot 10=50$  

$8\cdot 10=80$  

$\cdot 10$
3	30
5	50
8	80

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$2\cdot 7=14$  

$2\cdot 6=12$  

$2\cdot 9=18$  

$14\cdot 10=140$  

$12\cdot 10=120$  

$18\cdot 10=180$  

$\cdot 2$		*10
7	14	140
6	12	120
9	18	180

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$4\cdot 100=400$  

$6\cdot 100=600$  

$8\cdot 100=800$  

$\cdot 100$
4	400
6	600
8	800