a, 128 - 28.(4 - 12)

= 128 - 28.(-8)

= -8 . (-16) - 28 . (-8)

= -8 . (-16 - 28)

= -8 . (-44)

= 352

b, (-28) .32 + 58.(-28) + (-28) . 10

= -28 . (32 + 58 + 10)

= -28 . 100

= -2800

c, (-5 - 7) : (-7 + 5)

= -12 : (-2)

= 6

12,5%

Chắc chắn

Chiều dài hình chữ nhật là :

     75 : 3 = 25 ( cm )

Chiều rộng hình chữ nhật là :

     300 : 25 = 12 ( cm )

             Đ/S : Chiều dài : 25 cm

                       Chiều rộng : 12 cm

5abc = 10abc + 5 - 1719

10abc - 5abc = 1719 - 5

5abc = 1714

abc = 1714 : 5 = bạn tự tính nha

Hình ở trong vở bài tập toán 5

cần vẽ hình 0 bạn

5 + 5

= 5 x 2

= 10

k mk mk k lại

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