课件8张PPT。第5单元 6~10的认识和加减法 加减混合8373 + 5 =5-2 =10-3 =8-5 =38393 + 2 +3 =10-5-2 =3 + 2 +4 =7-2-3 =2想一想,算一算。一、复习引入4 + 3 – 2 =75二、探究新知4 – 2 + 3 =25344+-3 + 4 – 2 =8 – 5 + 3 = 9 – 5 + 2 =9 – 5 + 3 =5 + 5 – 6 =2 + 5 + 2 =6675944 + 4 – 2 =7 – 5 + 3 = 5 – 5 + 9 =9 – 6 + 7 =1 + 7 – 4 =8 + 1 – 2 =9510674三、实践应用1.算一算。车上原来有6人。 车上现在有多少人?6 – 5 + 8 =92. 3.