Câu 1, 2, 3, 4 trang 8 Vở bài tập (SBT) Toán 2 tập 1


    1. a) Số?  \(1dm\,\,\, = \,\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,10cm\,\,\, = \,\,\,\,dm\)    b) Viết 1dm, 2dm vào chỗ chấm thích hợp: 2. Số?3.  Điền dấu >, <, =\(\eqalign{ & 2dm\,\,\,\, = \,\,\,....\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,20cm\,\,\,\, = \,\,\,....\,\,\,dm \cr & 3dm\,\,\,\, = \,\,\,....\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,30cm\,\,\,\, = \,\,\,....\,\,\,dm \cr & 5dm\,\,\,\, = \,\,\,....\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,50cm\,\,\,\, = \,\,\,....\,\,\,dm \cr & 9dm\,\,\,\, = \,\,\,.....\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,90cm\,\,\,\, =...

    1. a) Số?  

    \(1dm\,\,\, = \,\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,10cm\,\,\, = \,\,\,\,dm\)

        b) Viết 1dm, 2dm vào chỗ chấm thích hợp:

     2. Số?

    Câu 1, 2, 3, 4 trang 8 Vở bài tập (SBT) Toán 2 tập 1

    3.  Điền dấu >, <, =

    \(\eqalign{
    & 2dm\,\,\,\, = \,\,\,….\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,20cm\,\,\,\, = \,\,\,….\,\,\,dm \cr
    & 3dm\,\,\,\, = \,\,\,….\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,30cm\,\,\,\, = \,\,\,….\,\,\,dm \cr
    & 5dm\,\,\,\, = \,\,\,….\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,50cm\,\,\,\, = \,\,\,….\,\,\,dm \cr
    & 9dm\,\,\,\, = \,\,\,…..\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,90cm\,\,\,\, = \,\,\,….\,\,\,dm\, \cr} \)

    4. Viết cm hoặc dm vào chỗ chấm thích hợp:

    Câu 1, 2, 3, 4 trang 8 Vở bài tập (SBT) Toán 2 tập 1

     

    BÀI GIẢI

    1.

    a)    \(1dm\,\,\, = \,\,10\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,10cm\,\,\, = \,\,\,1\,dm\)

    b)

     Câu 1, 2, 3, 4 trang 8 Vở bài tập (SBT) Toán 2 tập 1

    2. 

     \(\eqalign{
    & \,\,\,\,\,\,\,\,2dm\,\,\,\, = \,\,\,20\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,20cm\,\,\,\, = \,\,\,2\,\,dm \cr 
    & \,\,\,\,\,\,\,\,3dm\,\,\,\, = \,\,\,30\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,30cm\,\,\,\, = \,\,\,3\,\,\,dm \cr 
    & \,\,\,\,\,\,\,\,5dm\,\,\,\, = \,\,\,50\,\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,50cm\,\,\,\, = \,\,5\,\,\,dm \cr 
    & \,\,\,\,\,\,\,9dm\,\,\,\, = \,\,\,90\,\,cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,90cm\,\,\,\, = \,\,\,9\,\,\,dm \cr} \)

    3.  

    \(\eqalign{
    & 8dm\,\,\,\, = \,\,\,80cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,9dm\,\,\,\, – \,\,\,4dm\,\,\, > \,\,\,\,40cm\, \cr
    & 3dm\,\,\,\, > \,\,\,20cm\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,1dm\,\,\,\, + \,\,\,4dm\,\,\, < \,\,\,\,60cm\, \cr} \)

    4. 

    Câu 1, 2, 3, 4 trang 8 Vở bài tập (SBT) Toán 2 tập 1

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