According to current perspectives and teaching goals, integrated learning no longer stops at encouragement but becomes an inevitable trend that must be exploited in lessons at primary schools. Regarding Mathematics, the General Education Program 2018 stated: “Mathematics education creates connections between mathematical ideas and practice, between mathematics and subjects and activities. other educational activities”. Therefore, integrated learning needs to be researched and applied for Mathematics. This paper presents some ideas for applying integrated teaching to teaching Mathematics in grade 4 to help students better understand the role and applications of mathematics in real life, the relationship between mathematics and other subjects, helps teachers prepare well for effective educational lessons.