Number+Talks

= Messing With Numbers =

What patterns do you see here? 8 x 20 = 160 4 x 40 = 160 2 x 80 = 160 16 x 10 = 160 32 x 5 = 160 64 x 2.5 = 160 128 x 1.25 = 160

It is fair to double one number if you cut the other one in half. Why?

= = || 8x5=40 50+40=90 ||= Replace this text with how you would do this problem in your head. ||= Try this one and type in a solution. ||=  || (because I cut 18 in half and doubled 5) 9 x 10 = 90 ||=  ||=   ||=   ||
 * = =18 x 5= ||= =16 x 5= ||= =26 x 5= ||= =460 x 5=
 * = 10x5=50
 * = 18 x 5 is the same as 9 x 10