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除数的验算

除数的验算. 一 . 复习 1. 口算. 6 ×7= 42 ÷7= 42 ÷6=. 42. 10 ×5= 50 ÷5= 50 ÷10=. 50. 6. 10. 5. 7. 2. 最大能填几. 5. 8 × ( )  42. 4 × ( )  17. 4. ( ) × 3  20. 6. 5 × ( )  42. 8. ( ) × 5  8. 1. ( ) ×7  27. 3. 3. 用竖式计算:

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除数的验算

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  1. 除数的验算

  2. 一.复习 1.口算 6 ×7= 42 ÷7= 42 ÷6= 42 10 ×5= 50 ÷5= 50 ÷10= 50 6 10 5 7 2.最大能填几 5 8 ×( ) 42 4 ×( ) 17 4 ( ) ×3  20 6 5 ×( ) 42 8 ( ) ×5  8 1 ( ) ×7 27 3

  3. 3.用竖式计算: (1)32÷2= (2)32÷4=

  4. 3.用竖式计算: (1)32÷2= (2)32÷4= 16 8 8 1 6 43 2 23 2 3 2 2 0 1 2 1 2 0

  5. 3.用竖式计算: (1)32÷2= (2)32÷4= 16 8 8 1 6 43 2 23 2 3 2 2 0 1 2 1 2 0

  6. 325÷5= 5325

  7. 325÷5= 5325

  8. 325÷5= 65 325÷5= 6 5 5325 5325 30 25 25 0 被除数的前一位比除数小,就要看前两位。

  9. 练 一 练     65 8 2 9 3 7 7 1            0     0

  10. 猜一猜 商是几位数 4884 9 3762 6582 (三位数) (三位数) (二位数)

  11. 判断题 132 73 166 2364 9657 71162 2 63 7 6 27 46 6 27 42 4 0 42 4 42 0 0  (  )  (  )  (   )

  12. 计算、并验算: 3495 63858 42304

  13. 根据左边的算式, 在右边直接写出得数 7056÷9=784 784 9=( ) 291÷3=97 97 3= ( ) 12657=8855 8855÷7=( ) 7056 291 1265

  14. 想 一 想 1 7 5 6 2 2. 7 5 1. 5   5   3       5 0   2 5 0

  15. 1. 4 8 6 6 动 2. 4 2 8 8 脑 筋 商可能是几位数

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