20170915小一家長數學工作坊
2017-09-15 18.56.57 2017-09-15 18.57.04 2017-09-15 20.02.15 2017-09-15 20.02.54
2017-09-15 20.24.09 2017-09-15 20.24.11 2017-09-15 20.24.18 2017-09-15 20.24.19
2017-09-15 20.24.26 2017-09-15 20.24.28 2017-09-15 20.24.41 2017-09-15 20.24.46
20170915_200136 20170915_200550 20170915_202125 20170915_202158