Chiều dài mảnh vườn đó là:
    (27 + 9) : 2 = 18 ( cm )
Chiều rộng mảnh vườn đó là:
   18 - 9 = 9 ( cm )
Diện tích mảnh vườn đó là:
      18 x 9 = 162 ( cm2 )
                 Đáp số : 162 cm
cm2 là xăng-ti-mét vuông.
x là nhân.
100% là đúng nhé bạn!!

Diện tích: 162

=`12382483432578697984593844444444444444444449000000000000000000000000000000000000000000000000000000000000099999999999999999999999999999999999999999999999999999988888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888899999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999989484343554555454555545555555699995555454354354543542354445343554354523545554415554

Câu 9: 

Đổi: \(60cm=0,6m\).

Diện tích mỗi viên gạch là: 

\(0,6\times0,6=0,36\left(m^2\right)\)

Diện tích gạch trang trí là: 

\(0,36\times6=2,16\left(m^2\right)\)

Tiền mua gạch trang trí cho khuôn tranh nhà bác Bình là: 

\(2500000\times2,16=5400000\)(đồng) 

60/216 và 126/216

70617648

=70 617 648

1=8.2
2=15.6

có đúng không bạn

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