( -9 ) . | - 5 + 2 | + 4 . ( 7 - 9 )
= (-9)*3+4*(-2)
=-35
mấy bạn ơi : -5+2 = -3 cơ mà
=> \(|-5+2|=3\)chứ
a) |-5|.(-7)+4.(-9)
b) 1-2+3-4+5-6+...+2009-2010+2011
help mik vs pls
this is the absolute madness of the algebra equation. pls help me with 2 equations i had trouble finding the answer:
this one: 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + 9 + 10 -11 - 12 + 13 + 98 - 99 - 100 + 101 + 102
and this: 1 - 2 - 3 + 4 + 5 - 6 - 7 +. . . + 209 - 2010 - 2011 - 2012
1*2*3+2*3*4+3*4*5+4*5*6+5*6*7+6*7*8+7*8*9+8*9*10
^_^ ^_^ Help me! Mình sẽ cho đúng nếu có trình bày
tim chu so de 8a58a5....8a5 chia het cho 9
lu y : co 9 lan 8a5
help me pls!!!!!!!
1. Tính (bằng cách hợp lý nhất0
a, -2/5. 4/7 + -3/5 . 2/7 + -3/5
b,5/9.14/17+1/17.5/9+ 2/9 . 5/12
c,-4/25: 11/79 +15/11:25/79
d, (2/101: -5/9 + -3/7). (6/5-2/5:1/3)
Please help me!!!
Tìm y
a) ( 1/2*4 + 1/4*6 + 1/6*8 + 1/8*10) * y =1/3
b) ( 1/1*3 + 1/3*5 + 1/5*7 + 1/7*9 + 1/9*11) * y =2/3
Help me please!!!!!!!!!!!!!
[1/2+1/3+1/4+.....+1/10] .x=1/9=2/8+3/7+.....+9/1
help me
help me pls:
Biết 13+23+33+...+93=2025
Tính 23+43+63+...+183
help me, giải bài toán998+997+996-995-994+...+9+8-7-6+5+4-3-2+1 giúp mình nha.
