Obliczenia
[tex]15\cdot6=(10+5)\cdot6=10\cdot6+5\cdot6=60+30=\boxed{90}\\\\12\cdot7=(10+2)\cdot7=10\cdot7+2\cdot7=70+14=\boxed{84}\\\\32\cdot8=(30+2)\cdot8=30\cdot8+2\cdot8=240+16=\boxed{256}\\\\41\cdot9=(40+1)\cdot9=40\cdot9+1\cdot9=360+9=\boxed{369}\\\\59\cdot4=(60-1)\cdot4=60\cdot4-1\cdot4=240-4=\boxed{246}[/tex]
