15 \(\times\) ( 26 - 6 ) = 15 \(\times\) 20 = 300
15 x 26 - 15 x 6
= 15 x (26 - 6)
= 15 x 20
= 300
15 . 26 - 15 . 6
=15.( 26 - 6 )
=15.20
=300
15 \(\times\) ( 26 - 6 ) = 15 \(\times\) 20 = 300
15 x 26 - 15 x 6
= 15 x (26 - 6)
= 15 x 20
= 300
15 . 26 - 15 . 6
=15.( 26 - 6 )
=15.20
=300
12/15 x 26/11 - 12/15 x 9/11 - 12/15 x 6/11 tính nhanh mình tick
Tính :
2/5 + 11/15 =
7/8 - 7/9 =
11/13 x 26/31 =
16/24 : 4 =
30 : 6/5 =
9/16 : 4 =
1/2 : 1/3 x 8/15 =
15 x 26 + 15 x 74
Tính : ( 12 x 13 + 14 x 15 + ... + 24 x 25 + 26 x 27 ) x ( 14 + 6 - 10 + 5 - 3 x 5 )
7/17 + 6/5 x 7/12 =
9/8 - 7/13 + 14/26 =
8/15 - 2/9 + 4/7 =
Bai3: Tính
b. 4 x 6 x 10 x 12 x 15/ 4 x 12 x 5 x 24 x 30 =
c. 34 x 101 x 2005/ 17 x 202 x 4010=
d.6 x 8 x 11 x 13 x 17/ 33 x 16 x 17 x 26 =
Tính bằng cách hợp lí :
a, 1/5 x 2/9 : 1/15 b, 4/15 x 7/15 x 5/4
c, 21/23 x 5/11 x 44/ d, 26 x 13/42 : 13
Giải hộ tí tick
tìm x a, \(\dfrac{x}{4}\) =\(\dfrac{15}{20}\) b, \(\dfrac{15}{x}\) = \(\dfrac{25}{35}\) c, \(\dfrac{x}{5}\)=\(\dfrac{26}{65}\) d, \(\dfrac{3}{x}\)=\(\dfrac{51}{85}\)
a, X/3 = 10/15
b, X/5 = 26/65