姓名 ______________________日期 ____________得分 ____ / 12加法运算律练习加法运算律 · 1–12用加法运算律填空。简单替换1.9 + 6 = 6 + 简单替换2.2 + 1 = 1 + 简单替换3.8 + 4 = 4 + 简单替换4.4 + 9 = 9 + 简单替换5.5 + 9 = 9 + 简单替换6.1 + 4 = 4 + 简单替换7.4 + 3 = 3 + 简单替换8.7 + 4 = 4 + 简单替换9.9 + 7 = 7 + 简单替换10.7 + 3 = 3 + 简单替换11.7 + 2 = 2 + 简单替换12.1 + 2 = 2 + 答案 — 加法运算律练习加法运算律1.92.23.84.45.56.17.48.79.910.711.712.1由 Math Sheet Studio 制作 · mathsheetstudio.com — 免费可打印数学练习卷