Tính:
A = 2\(\frac{3}{4}\). (--0,4) - 1\(\frac{3}{5}\).2,75 + (-1,2) : \(\frac{4}{11}\)
Tính:\(B=2\frac{3}{4}.\left(-0,4\right)-1\frac{3}{5}.2,75+\left(-1,2\right):\frac{4}{11}\)
2\(\frac{3}{4}\)-.(-0,4)-1\(\frac{3}{5}.2,75+\left(-1,2\right):\frac{4}{11}\)
Giups nhanh nhe
tính nhanh
\(2\frac{3}{4}.\left(-0,4\right)-1\frac{3}{5}.2,75+1,2:\frac{4}{11}\)
-11/5 có cần cách giải ko? Nhân tiện chúc bn năm ms zui zẻ nhé!!!!!!!!!!!!!!!!!!!!
Tính
a) \(\frac{-1}{7}.\left(9\frac{1}{2}-8,75\right):\frac{2}{7}+0,625:1\frac{2}{3}\)
b)x-25%.x-1=-|-5|
c)\(2\frac{3}{4}.\left(0,4\right)1\frac{3}{5}.2,75+\left(-1,2\right):\frac{4}{11}\)
d) (2,8 x -32 ):\(\frac{2}{3}=-90\)
Tính:
\(2\frac{2}{4}.\left(-0.4\right)-1\frac{2}{3}.2,75+1,2\div\frac{4}{11}\)
\(2\frac{2}{4}\cdot\left(-0,4\right)-1\frac{2}{3}\cdot2,75+1,2:\frac{4}{11}\)
\(=\frac{5}{2}\cdot\left(\frac{-2}{5}\right)-\frac{5}{3}\cdot\frac{11}{4}+\frac{6}{5}:\frac{4}{11}\)
\(=\left(-1\right)-\frac{55}{12}+\frac{33}{10}\)
\(=\frac{137}{-60}\)
\(2\frac{3}{4}\)x ( - 0 , 4 ) - \(1\frac{3}{5}\) x 2,75 + 1,2 : 4 / 11
\(-2\dfrac{3}{4}\) . (-0,4) + \(1\dfrac{3}{5}\) . 2,75 - (1,2) : \(\dfrac{4}{11}\)
\(-2\dfrac{3}{4}.\left(-0,4\right)+1\dfrac{3}{5}.2,75-1,2:\dfrac{4}{11}\)
\(=\dfrac{11}{4}.\dfrac{-2}{5}+\dfrac{8}{5}.\dfrac{11}{4}-\dfrac{6}{5}:\dfrac{4}{11}\)
\(=\dfrac{11}{4}.\dfrac{-2}{5}+\dfrac{8}{5}.\dfrac{11}{4}-\dfrac{6}{5}.\dfrac{11}{4}\)
\(=\dfrac{11}{4}\left(\dfrac{-2}{5}+\dfrac{8}{5}-\dfrac{6}{5}\right)\)
\(=\dfrac{11}{4}.0\)
\(=0\)
1. C = -1,7 x 2,3 + 1,7 x (-3,7) - 1,7 x 3 - 0,17 : 0,1
D = \(2\frac{3}{4}\) x (-0,4) - \(1\frac{3}{5}\) x 2,75 + (-1,2) :\(\frac{4}{11}\)
E = \(\frac{\left(2^3.5.7\right).\left(5^2.7^3\right)}{\left(2.5.7^2\right)^2}\)
2.
5. a) Tính giá trị của các biểu thức sau:
A = 27 + 46 + 79 + 34 + 53;
B = -377 - (98 - 277);
C= -1,7.2,3 + 1,7.(-3,7) - 1,7.3 - 0,17 : 0,1;
D= \(2\frac{3}{4}\) . (-0,4) - \(1\frac{3}{5}\) . 2,75 + (-1,2) : \(\frac{4}{11}\);
E= \(\frac{\left(23.5.7\right).\left(52.73\right)}{\left(2.5.72\right)2}\)
A=(27+53)+(46+34)+79
A=80+80+79
A=160+79
A=239
B = -377 - (98 - 277)
B=-377-98-277
B=[(-377)+277]-98
B=(-100)-98
B=-198
C= -1,7.2,3 + 1,7.(-3,7) - 1,7.3 - 0,17 : 0,1
C=1,7.(-2.3)+1,7.(-3,7)+1,7.(-3)+1,7
C=1,7.[(-2,3+(-3,7)+(-3)+1]
C=1,7.(-8)
C=-13,6
Còn mái câu kia mk hk pít lm pn th/cảm cho mk nhae