一年级上册数学课件-8，9的加减法 20页

8、9的加减法 6 5 8 1 3 6 0 9 3 3 8 4 3 6 4 6 6+2= 62+6= 8- = 8- = 8 8 6 2 2 5+3=8 8-5=3 3+5=8 8-3=5 1 + 7 = 8 8 - 1 = 7 7 + 1 = 8 8 - 7 = 1 2 + 6 = 8 8 - 2 = 6 6 + 2 = 8 8 - 6 = 2 3 + 5 = 8 8 - 3 = 5 5 + 3 = 8 8 - 5 = 3 4 + 4 = 8 8 - 4 = 4 记住这4个算式我就会 说出其他几个算式？ 7 67 7 6 5 7 6 5 5 7 6 5 5 6 7 6 5 5 6 7 7 6 5 5 6 7 8 1 8 8 1 1 8 8 1 1 + 8 = 9 9 - 1 = 8 8 + 1 = 9 9 - 8 = 1 2 + 7= 9 9 - 2 = 7 7 + 2= 9 9 - 7 = 2 3 + 6 = 9 9 – 3 = 6 6 + 3 = 9 9 – 6 = 3 4 + 5 = 9 9 – 4 = 5 5 + 4 = 9 9 – 5 = 4