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邮递员叔叔送信

邮递员叔叔送信. 邮递员工作 10 天, 要送多少份报纸?. 工作 30 天,要送多少份报纸?. 300×10 =. 300×30 =. 300×10 = 3000. 300×3 = 900. 300×30 = 9000. 要送多少封信?. 要送多少封信?. 30×60 = 1800. 10×60 = 600. 80×10 = 60×20 = 50×40 = 700×20 = 90×90 = 40×80 =

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邮递员叔叔送信

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  1. 邮递员叔叔送信

  2. 邮递员工作10天, 要送多少份报纸? 工作30天,要送多少份报纸? 300×10= 300×30= 300×10=3000 300×3=900 300×30=9000 要送多少封信? 要送多少封信? 30×60=1800 10×60=600

  3. 80×10= 60×20= 50×40= 700×20= 90×90= 40×80= 24×10= 12×200= • 做一做 800 1200 2000 14000 8100 3200 2400 240

  4. 18 ≈ 20 22 ×20=440 22 ≈ 20 18 ×20=360 能坐下 18 ≈ 20 22 ≈ 20 20 ×20=400

  5. 每行约有 22个字 一页有23行 23 ≈ 20 22 ≈ 20 20×20=400(个) 23 ≈ 20 20×22=440(个) 一页大约有多少个字?

  6. 一共要付多少钱?

  7. 20×8=160(角) 30×6=180(角) 160 + 180 = 340 (角) 20×8 + 30×6= 340 (角) 一共要付多少钱? = 34(元)

  8. 算一算 9×99 = 9 × (100-1) = 900-9 = 891

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