3.52+15.22-26:2=3.25+15.4-13
=75+60-13=135-13=123
3.52+15.22-26:2
=3.25+15.4-26:2
=75+60-13
=135-13
=122
3.52+15.22-26:2
=3.25+15.4-26:2
=75+60-13
=135-13
=122
3.5^2+15.2^2-26:2
=3.25+15.4-26:2
=75+60-13
=135-13
=122
3.52+15.22-26:2=3.25+15.4-13
=75+60-13=135-13=123
3.52+15.22-26:2
=3.25+15.4-26:2
=75+60-13
=135-13
=122
3.52+15.22-26:2
=3.25+15.4-26:2
=75+60-13
=135-13
=122
3.5^2+15.2^2-26:2
=3.25+15.4-26:2
=75+60-13
=135-13
=122
Cho P = 1 + 2 + 22 + 23 + 24 + 25 + 26 + 27. Chứng minh P chia hết cho 3.
Bài 2: Tìm x (2đ)
a) 2x – 49 = 45
b) 145 – (x + 26) = 97
Tính nhanh
18 . 26 . 25 . 9
2 . 450 . 25 . 8
55 . 17 .16 . 15
125 . 98 . 2 . 8 . 25
15 . 6 . 4 . 125 . 8
Cho A=\(1\cdot3\cdot5\cdot7\cdot...\cdot49\)
B=\(\dfrac{26}{2}\cdot\dfrac{27}{2}\cdot...\cdot\dfrac{50}{2}\)
So sanhs A với B
Bài 1 : Tìm x
a) 3 . ( x + 7 ) + 2 . ( x - 5 ) = 26
b) 15 . ( x - 3 ) - 7 = 10 . ( x - 2 ) + 3
c) 3 . ( x + 5 ) - 2 . ( x - 7 ) = 18
Các bạn ơi , cho mk hỏi :
a/ 1+2+3+......+x = 378
b/ 26+8.x=6.x+46
-Mk xin cảm ơn-
Giúp mik câu 26 cảm ơn trc
215+(-38)-(-58)+90-85
31-[26-(2017+35)]
( 1374 . 57 + 687.56 ) : ( 26 . 13 + 74 . 14)