计算12+3 = 4 +15= 17 – 3 = 8 +2 = 14+3 =19 – 5 = 13+ 5 = 2+12 = 19 – 7 = 20

题型：计算题题类：常考题难易度：容易

西师大版小学数学一年级上学期第四单元第2课时《20以内加减法（不进位，不退位）》

计算

12+3 = 4 +15= 17 – 3 = 8 +2 = 14+3 =

19 – 5 = 13+ 5 = 2+12 = 19 – 7 = 20 – 10 =

举一反三

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