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合肥市太湖路小学 蒋洁

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合肥市太湖路小学 蒋洁. 合肥市太湖路小学 蒋洁. 苏教版小学数学第四册. 练习七. 比一比，算一算。. ＝ 7 ＝ 70. ＝ 8 ＝ 80. 12 － 5 15 － 7 120 － 50 150 － 70 11 － 6 18 － 9 110 － 60 180 － 90. ＝ 5 ＝ 50. ＝ 9 ＝ 90. 655 － 324 331. 331 ＋ 324 655.

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合肥市太湖路小学 蒋洁

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  1. 合肥市太湖路小学 蒋洁 合肥市太湖路小学 蒋洁 苏教版小学数学第四册 练习七

  2. 比一比，算一算。 ＝7 ＝70 ＝8 ＝80 12－5 15－7 120－50 150－70 11－6 18－9 110－60 180－90 ＝5 ＝50 ＝9 ＝90

  3. 655 －324 331 331 ＋324 655 516 －409 107 107 ＋409 516 357 －184 174 174 ＋184 357 用竖式计算，并验算。 ＝107 ＝173 655－324 516－409 357－184 ＝331 验算： 验算： 验算：

  4. 290 296 341 351 137

  5. 每只动物分别还要跑多少米才到游泳池？

  6. 算一算，比一比。 ＝434 ＝112 758－324 758－374 758－379 238－126 232－126 220－126 ＝384 ＝106 ＝379 ＝ 94

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