\(\dfrac{12}{35}\) . ( \(\dfrac{7}{4}\) + \(\dfrac{13}{4}\) ) - \(\dfrac{1}{3}\)
= \(\dfrac{12}{35}\) . \(\dfrac{20}{4}\) - \(\dfrac{1}{3}\)
= \(\dfrac{60}{35}\) - \(\dfrac{1}{3}\)
= \(\dfrac{29}{21}\)
1/ Tính giá trị biểu thức
A=\(\frac{7}{35}+\left(-1\frac{3}{4}+\frac{12}{7}\right)-\left(\frac{1}{4}-\frac{2}{7}-\frac{13}{35}\right)-\frac{3}{7}\)\(\frac{3}{7}\)
B=\(\sqrt{\frac{25}{16}-\frac{\left(-3\right)^2}{\left|-4\right|}}+\frac{\sqrt{\left(-7\right)^2}}{4}-3.\left(\frac{5}{2}\right)^2\)
Tính
1. 6/5 - 1/4 + 4/5 - 3/4
2. 7/9 - 5/12 + 2/9 - 7/12
3. -4/15 + 5/13 - 11/15 + 8/13
4. 9/15 - 7/13 +6/15 - 6/13
5. 12/5 - 3/7 + 3/5 - 4/7
6. 6/5 - 1/4 + 4/5 - 3/4 + 1/2
7. 13/7 - 8/6 + 8/7 - 4/6 - 1/3
6/5 có nghĩa là sáu phần năm đó nha mn
1, ( -2/5 + 3/10 ) : ( 2/-5 + |-4/3 - 2| )
2, 12,5 . -5/7 + 9 3/4 - 1,5 . 5/7
3, -1/4 . -5/13 - 5/4 . -7/13 + 1/1,3
4, ( -3/4 + 5/13 ) : 2/7 - ( 2 1/4 + 8/13 ) : 2/7
5, ( 3 - 3/4 + 2/3 ) - ( 2 - 4/3 - 3/2 ) - ( 1 - 7/3 - 9/2 )
6, -1/3 - 8/35 + -2/9 - 1/135 z+ 4/5 + -4/9 + 3/7
Tính hợp lý
a) 0.5+1/3+0.4+5/4+1/6-4/35
b) 8/9-1/72-1/56-1/42-1/30-1/20-1/12-1/6-1/2
c) 1/3*-4/5+1/3+-6/5
d)3/7*9/26-1/14*1/13
e) (-3/4+2/5):3/7+(3/5+-1/4):3/7
Giúp mik câu này mik đag cần gấp
Tính :
1)3/5 x1/7 +3/5 x6/7 -3/5
2)6/7 x4/9 + 6/7 x5/9 + 6/7
3) 9/13 x 7/12 + 9/13 x 5/12 - 9/13
4) 4/13 x5/12 +4/13 x 7/12 - 4/13
( 3-3/4+2/3)-(2+4/3-3/2)-(1-7/3-9/2)
-1/3-8/35+-2/9-1/135+4/5+-4/9+3/7
0,75+0,6-3/7-3/13
______________________
2,75+2,2-11/7-11/13
1) 9/13 x 7/12 +9/13 x 5/12 - 9/13
2) 4/13 x5/12 + 4/13 x 7/12 -4/3
Giải chi tiết cho mik nha mik đag can gap
1. Tính hợp lí:
a) B = 1/2 - [ 3/8 + ( -7/4 ) ]
b) -4/12 - ( -13/39 - 0,25 ) + 0,75
c) 1/2 - 1/3 + 1/23 + 1/6
d) ( -13/7 - 4/9) - ( -10/7 - 4/9 )
e) ( 7/8 - 5/2 + 4/7 ) - ( -3/7 + 1 - 13/8 )
f) -3/7 + ( 3 - 3/4 ) - ( 2,25 - 10/7)
g) ( 5/3 - 3/7 + 9 ) - ( 2 + 5/7 - 2/3 ) + ( 8/7 - 4/3 - 10 )
(3/4-13/11+7/5)-(3-1/2-35/11)+(11/4-2/5)
