NO PREP! “Rekenrek or Abacus- Abaco” No more busy worksheets. Students will be able to complete these sheets at their on level and independently. Just print these printable sheets at different levels to facilitate the students learning. The addition printables are in three levels, so you can easly differentiate in you classroom and also there is a Center game and a recording sheet. 1 Center Game and a Recording sheet 6 Printables for adding with the abacus 1 to 5 level 1 (one line abacus 1-5) 6 Printables for adding with the abacus 1 to 5 level 2 (double line acabus 1-5) 6 Printables for adding with the abacus up to 5 Level 2 (double line abacus 1 to 10) 12 Printables for finding the missing number up to 5 Level 1 (one line abacus 1 to 5) 11 Printables for finding the missing number up to 5 Level 2 (doble line abacus 1 to 5) 11 Printables for finding the missing number up to 5 (double line abacus 1-10) 10 Printables for adding with the abacus up to 10 8 Printables for finding the missing number up to 10 Total Pages164