专练三 10.整数加法运算律推广到小数(2)-【AI•易错题】2025-2026学年四年级数学下册竖式练习（人教版）

6?小数连加 ①9.38②3.29③6.22④2.72 ⑤3.05⑥9.72⑦2.86⑧5.6 ⑨6.2⑩6.8①5.7②9.9 ⑦？小数连减 ①0.8②0.1③0.4④4.6⑤1 ⑥3⑦15⑧5.1⑨0.8⑩3.5 ①2.1②1.17 ⑧？小数加减混合运算 ①8.5②4.42③16.5④14.7 ⑤21.94⑥4.24⑦2.07⑧6.48 ⑨13.4101.231①9.541211.82 ③13.42④3.74⑤7.08⑥2.2 ⑦12.96⑧6.3⑨25.46④5.16 ②①1.2②26.11③4.7②④15.9 256.526242⑦6.76288.35 2919.553@1.68③①8.05322.7 336.4 9?整数加法运算律推广到小数(1) ①11.8②7.06③6.8④3⑤4.4 参考答案 ⑥4.46⑦0.2⑧10.2⑨11⑩4.83 ①70.8②55.88③22.27④10.5 ⑤22.76⑥54⑦80⑧38.5⑨39.2 ⑩50②①5.73②②45.72②312.17 ④30.69②⑤69②⑤51.93@26.44 10整数加法运算律推广到小数(2) ①20②10③16④21⑤14 ⑥13⑦46.7⑧63.3⑨38.85 ⑩33.3①23.02②17.3③9.9 ④6.78⑤20.67⑥22.76⑦34.98 ⑧22.73⑨9.882⑩37.7②@41.4 ②②43.5332.4②④53.78⑤37.35 2④41.9⑦45.8 阶段练习(5) 1.①7.33②4.18③10.15④7.6 ⑤0.2⑥6.36⑦5.96⑧9.63 ⑨5.81⑩2.45①8.7②8.9 ③2.32④8.8⑤2.76 2.①7.85②9.84③37.62④0.39 59专练三 小数的加法和减法 10 整数加法运算律推广到小数(2) 易错剖析 高频易错点：运用减法的运算性质时，加括号后括号内的数未变号 易错指数●●● 用简便方法计算：18.75-6.5-8.75-3.5 错解：18.75-6.5-8.75-3.5 正解：18.75-6.5-8.75-3.5 =（18.75-8.75)-(6.5-3.5) =（18.75-8.75)-（6.5+3.5) =10-3 =10-10 =7 加括号后，未改 变运算特号 =0 学以致用 ① 58.92-15.5-18.92-②32.66-3.5-12.66-6.5③47.35-13.5-12.35-5.5 4.5 = = 二 ④37.7-3.5-11.7-1.5⑤38.27-8.5-2.5-13.27⑥36.67-9.5-7.5-6.67 = 二 ⑦23.68+15.7+7.32 ⑧45.87+6.3+11.13 ⑨53.68-(21.68-6.85) 45 竖式 四年级 下册 ⑩38.55+21.3-26.55 ①78-32.38-22.6 ②56.8-(16.7+22.8) = 之 = 人 348.9-26.7-12.3 1④38.78-17.6-14.4 ⑤19.9-7.33+8.1 = = = = = = ⑥36.76-12.35-1.65 1⑦58.98-22.57-1.43 1⑧38.9-(18.9-2.73) = = = = 1923.88-10.46-3.542028.9+14.7-5.9 ②①13.6+36.4-8.6 = = = 2248.7+13.5-18.7 2331.96+12.4-11.96 2453.78-25.87+25.87 = = = 2533.63-8.65+12.37 2⑥23.9+6.12+11.88 2⑦16.77+7.8+21.23 46