You first add the units, then the tens.
Adding numbers through the split strategy (171 + 23 = 100 + (70+20) + (3+1) = 194)
83. If your can't use a calculator use your fingers, or just do it in your head!
5 + 23 + 10 + 23 = 61
1 + 54 + 23 + 23 + 43 = 144
Ys Strategy was created on 2006-03-23.
The Fabian Strategy was created on 2010-09-23.
The Strategy Room - 2008 - 2011-08-23 was released on: USA: 23 August 2011
18 + 23 + 23 = 64
18+18+18+19+23+23+24+24=167
19 + (44 + 23) = (19 + 44) + 23
Strategy - 1911 was released on: USA: 23 February 1911
what plus what = 23