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1) ta có : 180= 9 x 5 x 4

Mà 1494 chia hết cho 9; 1495 chia hết cho 5 và 1496 chia hết cho 4.

=> 1494 x 1495 x 1496 chia hết cho 180.

2)Ta có 495= 9 x 5 x 11

Mà 1494 chia hết cho 9; 1495 chia hết cho 5 và 1496 chia hết cho 11.

=> 1494 x 1495 x 1496 chia hết cho 495.

k mình nha !!!

16 tháng 10 2022

suiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

29 tháng 8 2017

a) 

...1494 chia hết cho 9, 1495 chia hết cho 5, 1496 chia hết cho 4 nên 

...A=1494.1495.1496 chia hết cho 9.4.5=180 (đpcm) 

b)1494 chia hết cho 9, 1495 chia hết cho 5, 1496 chia hết cho 11 nên 

...A=1494.1495.1496 chia hết cho 9.5.11=495 (đpcm) 

4 tháng 10 2015

1) ta có : 180= 9 x 5 x 4

Mà 1494 chia hết cho 9; 1495 chia hết cho 5 và 1496 chia hết cho 4.

=> 1494 x 1495 x 1496 chia hết cho 180.

2)Ta có 495= 9 x 5 x 11

Mà 1494 chia hết cho 9; 1495 chia hết cho 5 và 1496 chia hết cho 11.

=> 1494 x 1495 x 1496 chia hết cho 495.

 

16 tháng 10 2022

suiiiiiiiiiiiiiiiiiiiii

21 tháng 10 2023

(Mình chỉ làm đc bài 1 thôi nhé)
Bài 1:
A = 1 + 2 + 3 + 4 +...+999
2A= (1+999)+(2+998)+(3+997)+...+(999+1)
Ta nhận thấy các kết quả của các tổng trong ngoặc trên đều bằng 1000 (số chẵn), mà các số chia hết cho 2 là số chẵn, suy ra A chia hết cho 2

22 tháng 10 2023

Cảm ơn nhee

14 tháng 10 2015

CM chia hết cho 495 làm tương tự biết 495=11x9x5 nha bn

14 tháng 10 2015

b1/

ta có : 180=4x5x9

mà 1494 chia hết cho 9

1495 chia hết cho 5

1496 chia hết cho 4 

=> 1494 x 1495x 1496 chia hết cho 180

 

10 tháng 7 2016

MIIK CHẲNG HIỂU CÁI ĐỀ MẤY

25 tháng 9 2015

a) Ta có: 1494:9

1495:5

1496:4

=> 1294.1495.1496:9.5.4

=>1494.1495.1496:180

b)Ta có: 1494:9

1495:5

1496:11

=>1494.1495.1496:9.5.11

=>1494.1495.1496:495