Tìm 𝒙, biết:
𝒙 × 18 - 𝒙 × 13 = (285 : 4 - 20,25) × 4
A.
44,5
B.
42,8
C.
39,5
D.
40,8
Tìm 𝒙, biết:
𝒙 × 38 - 𝒙 × 30 = 156,4 × 5 - 88
A.
87,75
B.
85,25
C.
86,75
D.
88,5
Tìm 𝒙, biết:
𝒙 × 683,46 + 𝒙 × 246,221 - 𝒙 × 859,681 = 17,65 × 34,4 + 611,256 × 2,5 - 35,3
Tìm x \(1-\left(x\%+x:50+\frac{\frac{3}{2}-\frac{3}{7}-\frac{3}{13}}{\frac{25}{2}-\frac{25}{7}-\frac{25}{13}}\times x\right)=0\)
So sánh \(A\)với\(13\),biết rằng:
\(A=\frac{13}{15}+\frac{7}{5}+\frac{3}{4}+\frac{1}{5}+\frac{1}{7}+\frac{19}{20}+\frac{5}{4}+\frac{1}{3}+\frac{1}{6}+\frac{1}{13}+\frac{17}{23}+\frac{9}{8}+\frac{2}{5}+\frac{1}{7}+\frac{1}{25}+\frac{3}{2}+\frac{1}{8}+\frac{1}{19}+\frac{1}{9}+\frac{1}{97}\)
Các bạn ơi giúp mình với gấp lắm rồi
1.(250+x:24-15)*7=3600
2.729:(32+x-435)=150:15
3.(245:5+x-15):14-5=5
4.502-x+37-13=46+27
5.847+x*6-382=615+42
6.743-27*18-x+38:2-27=18
7.530+48-x+38:2-27=18*12
8.618+x*(386-248:4)=15846
lam ho nha dang can gap
a ) x + 5,84 =9,16
b )\(x=\frac{1}{5}-\frac{3}{7}\)
c)\(\frac{x}{5}=\frac{5}{6}-\frac{13}{30}\)
d )\(x+\frac{3}{4}=\frac{4}{5}\)
e )\(\frac{x}{7}=\frac{7}{8}-\frac{25}{56}\)
25 2/13 -(15/17+ 15 2/3)
5/30 + 15/90+250/150+350/210+45/270
3 1/11 nhân 27/46 nhân 1 6/17 nhân 2 4/9
Bài 1 : Tính nhanh
a , \(\frac{34}{31}-\frac{19}{28}-\frac{3}{31}\) b , \(\frac{18}{13}+\frac{55}{46}-\frac{5}{13}\)
c , \(\frac{7}{3}+\frac{11}{5}-\frac{4}{3}\) d , \(\left(\frac{27}{25}-\frac{4}{9}\right)-\left(\frac{2}{25}-\frac{5}{9}\right)\)
e , \(2,125+5\frac{3}{8}+7,15+6\frac{17}{20}+7,5\)