252 bài Toán luyện thi Violympic lớp 3

Thứ tư - 06/01/2016 11:54
252 bài Toán luyện thi Violympic lớp 3 - Đề luyện thi giải toán qua Internet lớp 3

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  • giang
    cho tôi đáp án đi
      giang   02/04/2023 07:54
  • le phung thao
    Mot hinh chu nhat co chieu dai 8cm,chieu rong 4cm.mot hinh vuong co chu vi bang chu vi hinh chu nhat . Dien tich hinh vuong lon hon dien tich hinh chu nhat la
      le phung thao   29/04/2016 00:20
    • @le phung thao vì chu vi hình vuông bằng chu vi hình chữ nhât nên: chu vi là: ( 8+4)x2=24 (cm)
      diện tích hình chữ nhật là: 8x4=32 (cm2)
      cạnh hình vuông là: 24:4= 6 (cm) vì chu vi hình vuông bằng chu vi hình chữ nhât .
      duện tich hình vuông là: 6x6=36(cm2)
      diện tích hình vuông lớn hơn diện tích hình chữ nhật là: 36-32=4(cm2)
        KS Carieuhong   19/03/2017 08:47

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