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Hay lắm

Hi

1+1=

79+34-19=113-19= 94       

221x(43-39)=221x4=884

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a) 67.36 + 67.65 - 67

  = 67. (36 + 65 - 67)

  = 67. 34

  = 2278

b) ( 7²³ .45 + 7²³ .4) : 7²⁵ 

a) 

      6: VI               24: XXIV             39: XXXIX

b)

     Ư(36) = { 9;12;18;36}

lược đồ trí nhớ là những thông tin không gian về thế giới được giữ lại trong trí óc của con người

Để  đọc tỉ lệ bản đồ,chúng ta cần                                                                                                                              -đọc tên bản đồ để biết nội dung và lãnh thổ được thể hiện