摘要：Knowing number facts up to 10 become crucial if we want students to solve addition and subtraction problems using more abbreviated strategies. Otherwise, students will keep c ounting one - by - one until they ge t an answer. One of important number facts is number pairs that make ten because it is an important 'benchmark' that students will refer to constantly. Consi dering the important of number facts up to 10, we designed a parrot game activity to supports students learning process. We designed an instructional activity based on Realistic Mathematics Education (RME) approach. We tried this instructional activity wit h twenty seven first grade students in SDN 179 Palembang. As a result, we found that many first g rade students were able to know number facts up to 10, but they still need models to support their thinking.
关键词：number facts up to 10; number pairs that make 10; and parrot game.
