56 times 20 =? If a * b = 56, then [a * 10 * b * 10 =? ］；［a/2］*b/2＝？ *It's multiplication and division/

56 times 20 =? If a * b = 56, then [a * 10 * b * 10 =? ］；［a/2］*b/2＝？ *It's multiplication and division/


a*10*b*10＝5600
[a/2］*b/2=14



What's 56 times 50


2800



Look at the formula, 1 + 2-3-4 + 5 + 6-7-8 + 9 + 10 +2010, how much?


1+2-3-4+5+6-7-8+9+10…… +2010
=（1+2-3-4）+（5+6-7-8）+…… +(2005 + 2006-2007-2008) + 2009 + 2010, a total of 502 groups, more than 2009 and 2010, the sum of each group is - 4
= -4×502+2009+2010
=1+2010
=2011

Elden Ring Premiere

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