Question

calculeaza fo!osind procedeul preferat.26x6.5x34.45x9. 8x37. .78x7. .7x78..96x 5. 5x99. 99x8. 3x58 ...79x6. 8x88.

Answer 1

Descompun factorii de 2 cifre in, zeci si unitati ...
exemplu: 8×37=8×(30+7)=...   etc. 

8×37=8×30+8×7=240+56=296;
78×7=7×70+7×8=490+56=546;
7×78=78*7=546;
96×5=5×90+5×6=450+30=480;
5×99=5×90+5×9=450+45=495;
99×8=8×90+8×9=720+72=792;
3×58= 3×50+3×8=150+24= ...
79×6=70×6+9×6=420+54= ...
8×88=8×80+8×8=640+64= ...