Chỉ với các số 2,4,6,8,12,14,16,18 hãy điền thêm vào các ô vuông bên phải để có được hình vuông kì diệu .
10 | ||
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2 | 4 | 6 |
8 | 10 | 12 |
14 | 16 | 18 |
16 | 2 | 12 |
6 | 10 | 14 |
8 | 18 | 4 |
2 | 8 | 14 |
4 | 10 | 16 |
6 | 12 | 18 |
nếu thấy đúng thì cho **** nhé các bạn
Thôi khỏi cần
Lời giải chi tiết:
Gọi S là tổng số tất cả các số trong các ô vuông, T là tổng số các số ở mỗi cột, hàng, đường chéo.
Ta có S=1+2+...+9=45 nên T=45:3=15, ta có 15−α=a+c=b+d=m+n=p+q.
Có 4.(15−α)=(a+c)+(b+d)+(m+n)+(p+q).
Suy ra 60−4α=S−α=45−α.
Vậy 3α=15, hay α=5.
mình cũng có câu hỏi như thế mình cũng học cô loan mà đúng không bà là cẩm thanh mà bà cũng học cô loan mà
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kj
cứ cộng 3 ô theo thẳng hình cột, ngang, chéo đều có tổng =-30
phải k?
Oh my god !!!!! xin lỗi nhé chỉ mới học lớp 4 thôi
Thông cảm nha !!!!!!
ko có ai trả lời đâu vì toán quá khó cơ nhưng tuj làm được làm biếng viết quá thông cảm nha