x + 234 = 567
x + 891 = 2345
123 + 456 + 789 + 234 + 567 + 891
2345-234
2345-234
2345-234=2111 (nha) Ai k mình mình k lại
tìm x thuộc Z:
-(-432-3x)+(-432-4x+21)=-2345
12x-(-3546-3x)=(2x-234)-(-678-2x)
a/\(-\left(-432-3x\right)+\left(-432-4x+21\right)=-2345\)
\(\Leftrightarrow+432+3x-432-4x+21=-2345\)\(\Leftrightarrow\left[432+\left(-432\right)\right]+\left[\left(-4x\right)+3x\right]+21=-2345\)
\(\Leftrightarrow0+-1x+21=-2345\)\(\Leftrightarrow-1x=-2345-21=-2366\)
\(\Rightarrow x=\left(-2366\right):\left(-1\right)=2366\)
b/\(12x-\left(-3546-3x\right)=\left(2x-234\right)-\left(-678-2x\right)\)
\(\Leftrightarrow12x+3546+3x=2x-234+678+2x\)
\(\Leftrightarrow15x+3546=\left(2x+2x\right)+\left[\left(-234\right)+678\right]\)
\(\Leftrightarrow15x+3546=4x+444\)
\(\Leftrightarrow15x+3546-4x-444=0\)
\(\Leftrightarrow\left(15x-4x\right)+\left(3546-444\right)=0\)
\(\Leftrightarrow11x+3102=0\)
\(\Leftrightarrow11x=0-3102=-3102\)
\(\Rightarrow x=\left(-3102\right):11=-282\)
hãy sắp sếp các số phân số sau theo thứ tự từ bé đến lớn. 124/234; 204/219; 2345/2345; 125/219 mik cần gấp ạ( cái này nâng cao ạ)
10+16-13+29=
798+291=
1029+234=
2345+835=
234-287=
102+296=
871+293=
102+492=
10+16-13+27=26-13+27=13+27=40
798+291=1089
1029+234=1263
2345+835=3180
234-287=-53
102+296=398
871+293=1164
102+492=594
10 +16-13+29 = 26 - 13 + 29 = 13 + 29 = 42
798+291= 1089
1029+234= 1000 + 29 + 200 + 34 = 1000 + 200 + 29 + 34 = 1200 + 63 = 1263
2345+835= 3180
234-287= -53
102+296= 398
871+293= 1164
102+492= 594
10+.....+29=42
798+291=1089
1029+234=1263
2345+835=3180
234-287=-53
102+296=398
871+293=1164
102+492=594
HOT TỐT!
(1/3+3/4-13/12):(12/23+123/234+1234/2345)
AI KB MIK ĐI MIK MỚI LẬP NICK THUI
2345 - 234 + 198
ket
qua
abgn
2309
nah aban
chuc ban hok tot
Tính nhanh
(1/3+3/4+13/14):(12/23+123/234+1234/2345)