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1.口算.    60 ÷ 30 80 ÷ 20 180÷60    450 ÷ 50 240 ÷ 40 720 ÷ 80

2.在下面的括号里最大能填几?    30 ×( )< 200   40 ×( )< 270. 30 ×( )< 61 40 ×( )< 84 70 ×( )< 270 80 ×( )< 3 20 ×( )< 48 50 ×( )< 140. 1.口算.    60 ÷ 30 80 ÷ 20 180÷60    450 ÷ 50 240 ÷ 40 720 ÷ 80    540 ÷ 90 420 ÷ 70 280 ÷ 40. 除数是一位数的除法法则:.

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1.口算.    60 ÷ 30 80 ÷ 20 180÷60    450 ÷ 50 240 ÷ 40 720 ÷ 80

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  1. 2.在下面的括号里最大能填几?    30 ×( )< 200   40 ×( )< 270 30 ×( )< 61 40 ×( )< 84 70 ×( )< 270 80 ×( )< 3 20 ×( )< 48 50 ×( )< 140 1.口算.    60 ÷ 30 80 ÷ 20 180÷60    450 ÷ 50 240 ÷ 40 720 ÷ 80    540 ÷ 90 420 ÷ 70 280 ÷ 40

  2. 除数是一位数的除法法则: 1.从被除数的高位除起,先用除数试除被除数的前一位数, 如果它比除数小,再试除前两位数; 2.除到被除数的哪一位,就在哪一位上面写商; 3.每次除后余下的数必须比除数小.

  3. 2 0 6 0 例1 60个同学去参观航空模型展览,每20个同学编成一队, 可以编成几队? 3 6 0 0 答:可以编成3队.

  4. ) ) 1 0 2 0 3 0 9 0 3 0 8 0 做一做 用竖式计算下面各题. 3 4 3 3 0 8 0 9 0 0 0 0

  5. 3 0 2 0 0 例2 200 ÷ 30 = …… 6 20 6 1 8 0 2 0

  6. 做一做 用竖式计算下面各题. 7 7 5 2 0 ) 5 0 ) 8 0 ) 1 4 0 2 8 0 5 7 5 1 4 0 2 5 0 5 6 0 1 5 3 0 0

  7. 除数是两位数的除法法则: 1.从被除数的高位除起,先用除数试除被除数的前两位数, 如果它比除数小,再试除前三位数; 2.除到被除数的哪一位,就在哪一位上面写商; 3.每次除后余下的数必须比除数小.

  8. 1.说出下面各题的商是几?应该写在什么位置.1.说出下面各题的商是几?应该写在什么位置. 2.判断下面各题,对的画“√”,错的画“×”.

  9. 3.计算下面各题. 380÷40= 500÷70= 660÷80= 250÷60= 280÷50= 830÷90= 4.思考题. (1)在下面的□里填上适当的数. □÷40=6……28  500÷□=7……10 (2)20个少先队员收了160千克苹果,如果每筐装20千克, 还差2个筐.原来有几个筐?

  10. 用整十数除商一位数

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