一年级

本节重点：练习一总结（附练习一课后答案）

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练习一答案：

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二年级

预习小测验

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三年级

本节重点：认识简单的路线图

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四年级

本节重点：练习二总结（附练习一课后答案）

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练习二答案：

1、（1）乘法 （2）除法 （3）除法 （4）除法

2、13936÷208=67 13936÷67-208

1125÷45=25 25×45 =1125

1008÷21=48 21×48=1008

3、356÷89=4 774÷18=43

672÷24-28 20×35=700

4、10 15 420 36

5、 1296 8670 26 12(验算略)

6、12×6+3=75(个)

7、24 0 0 0

70 504 0 0

8、 36 7 156 16

9、× √ √ ×

10、(1)（一口）×（+）=

(2)×口-÷=

思考题

分析：由14+82-=87可得=14+82-87=9，

由×6+10=58可得=（58-10）÷6=8.

解答：密码是9898.

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五年级

预习小测验

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六年级

预习小测验

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