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加减法估算

加减法估算. 邢 玉. 黑猫警长. 48. 41. 27. 73. 39. 2. 3. 粒. 粒. 白菜子. 南瓜子. 讨论: 它们的和会比50小吗? 它们的和会比70大吗?. 两种菜籽大约共丢了多少粒呢?. 白菜子. 南瓜子. 22. 37. 粒. 粒. 和松鼠妹妹的松子比,我比她大约 多丢了多少粒呢?. 白菜子. 南瓜子. 38颗. 59 粒. 我和松鼠妹妹大约共 丢了多少粒种子?. 白菜子. 南瓜子. 38颗. 59 粒. 80粒. 100粒. 手电28元.

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加减法估算

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  1. 加减法估算 邢 玉

  2. 黑猫警长

  3. 48 41 27 73 39

  4. 2 3 粒 粒 白菜子 南瓜子

  5. 讨论: 它们的和会比50小吗? 它们的和会比70大吗?

  6. 两种菜籽大约共丢了多少粒呢? 白菜子 南瓜子 22 37 粒 粒

  7. 和松鼠妹妹的松子比,我比她大约 多丢了多少粒呢? 白菜子 南瓜子 38颗 59粒

  8. 我和松鼠妹妹大约共 丢了多少粒种子? 白菜子 南瓜子 38颗 59粒 80粒 100粒

  9. 手电28元 背包43元 救生衣27元 我只有100元, 要买这三样用品, 够吗?

  10. 一只耳藏在得数 大于80的算式后面。 100-10-12 90-11 21+52 23+41+29

  11. 估算

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