Please help. 90x9 and 6x14.
90*9=9*9*10=81*10=810
6*14=6*2*7=12*7=84
Okay so 90x9 equals to 810. Here is how I did it...
(90x10)-(90x1)=900-90=810
6x14 equals to 84. The steps are here...
(5x14)+(1x14)=70+14=84
Hope this helps : )
