6/13 : 12
15 : 5/22
1/3 : 2/5 : 3/4
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Những câu hỏi liên quan
4 tháng 2 2017
\(-9-13-\left(-24\right)+11\)
\(=\left(-9-13\right)+\left(24+11\right)\)
\(=-22+35\)
\(=13\)
NN
1
25 tháng 1 2019
(-2)-13+(-14)-19
= (-2)+(-13)+(-14)-19
= (-15)+(-14)-19
= (-29)-19
= (-29)+(-19)
= (-48)
221+4[(-5).8-4]
= 225 [(-40)-4]
= 225 [(-40)+(-4)]
= 225 (-44)
= (-9900)
(-2)3.(-2)2+32
= (-2)5+32
= (-32) + 32
= 0
(-15).12-8.(-12)
= (-180)-(-96)
= (-84)
tick cho mình
NN
1
19 tháng 2 2019
= (-2)+(-13)+14-19
= (-15) +14-19
= (-1) - 19
= (-1) + (-19) =(-20)
= 221+4[(-40)-4]
= 221+4[(-40)+(-4)]
= 221+4 (-44)
= 221+(-176) =45
= (-8) . 4+32
= (-32) +32 = 0
= (-180) - (-96) = (-84)
tick cho mình
18 tháng 4 2023
\(1,-\dfrac{4}{7}+\dfrac{2}{3}\times\dfrac{-9}{14}\)
\(=\dfrac{-4}{7}+\dfrac{-18}{42}\)
\(=\dfrac{-4\times6}{7\times6}+\dfrac{-18}{42}\)
\(=\dfrac{-20}{42}+\dfrac{-18}{42}\)
\(=-\dfrac{38}{42}\)
\(=-\dfrac{19}{21}\)
\(2,\dfrac{17}{13}-\left(\dfrac{4}{13}-11\right)\)
\(=\dfrac{17}{13}-\dfrac{4}{13}+11\)
\(=\dfrac{13}{13}+11\)
\(=1+11\)
\(=12\)
\(3,8\dfrac{2}{7}-\left(3\dfrac{4}{9}+4\dfrac{2}{7}\right)\)
\(=\dfrac{58}{7}-\left(\dfrac{31}{9}+\dfrac{30}{7}\right)\)
\(=\dfrac{58}{7}-\dfrac{31}{9}-\dfrac{30}{7}\)
\(=\dfrac{58}{7}-\dfrac{30}{7}-\dfrac{31}{9}\)
\(=\dfrac{28}{7}-\dfrac{31}{9}\)
\(=\dfrac{28\times9}{7\times9}-\dfrac{31\times7}{9\times7}\)
\(=\dfrac{252}{63}-\dfrac{217}{63}\)
\(=\dfrac{35}{63}\)
\(=\dfrac{5}{9}\)
\(5,\left(\dfrac{2}{3}-1\dfrac{1}{2}\right):\dfrac{4}{3}+\dfrac{1}{2}\)
\(=\left(\dfrac{2}{3}-\dfrac{3}{2}\right):\dfrac{4}{3}+\dfrac{1}{2}\)
\(=\left(\dfrac{2\times2}{3\times2}-\dfrac{3\times3}{2\times3}\right):\dfrac{4}{3}+\dfrac{1}{2}\)
\(=\left(\dfrac{4}{6}-\dfrac{9}{6}\right):\dfrac{4}{3}+\dfrac{1}{2}\)
\(=\dfrac{-5}{6}:\dfrac{4}{3}+\dfrac{1}{2}\)
\(=\dfrac{-5}{6}\times\dfrac{3}{4}+\dfrac{1}{2}\)
\(=\dfrac{-15}{24}+\dfrac{1}{2}\)
\(=\dfrac{-15}{24}+\dfrac{1\times12}{2\times12}\)
\(=\dfrac{-15}{24}+\dfrac{12}{24}\)
\(=\dfrac{-3}{24}\)
\(=-\dfrac{1}{8}\)
\(6,\dfrac{-5}{13}+\dfrac{2}{5}+\dfrac{-8}{13}+\dfrac{3}{5}-\dfrac{3}{7}\)
\(=\left(\dfrac{-5}{13}+\dfrac{-8}{13}\right)+\left(\dfrac{2}{5}+\dfrac{3}{5}\right)-\dfrac{3}{7}\)
\(=\dfrac{-13}{13}+\dfrac{5}{5}-\dfrac{3}{7}\)
\(=-1+1-\dfrac{3}{7}\)
\(=-\dfrac{3}{7}\)
\(7,\dfrac{6}{5}\times\dfrac{3}{7}+\dfrac{6}{5}:\dfrac{7}{10}+\dfrac{6}{5}\)
\(=\dfrac{6}{5}\times\dfrac{3}{7}+\dfrac{6}{5}\times\dfrac{10}{7}+\dfrac{6}{5}\)
\(=\dfrac{6}{5}\times\left(\dfrac{3}{7}+\dfrac{10}{7}+1\right)\)
\(=\dfrac{6}{5}\times\left(\dfrac{3}{7}+\dfrac{10}{7}+\dfrac{1\times7}{1\times7}\right)\)
\(=\dfrac{6}{5}\times\left(\dfrac{3}{7}+\dfrac{10}{7}+\dfrac{7}{7}\right)\)
\(=\dfrac{6}{5}\times\dfrac{20}{7}\)
\(=\dfrac{120}{35}\)
\(=\dfrac{24}{7}\)
LA
2
E
26 tháng 2 2020
a) . -2 - 13+ ( -14 ) - 19
= (-15) + (-14) -19
= -29 -19 = -48.
b)221+4[(-5).8-4]
= 221 + 4. [ -40 - 4 ]
= 221 + 4 . -44
= 221 + -176 = 45
c) (-2)^3.(-2)^2+32
= -8 . 4 + 32
= -32 + 32 = 0
d) -15 . 12 - 8 . ( -12 )
= (-15.12) . (-8.-12)
= -180 . 96 = -17280
Hok tốt !
26 tháng 2 2020
a) -2 - 13+ ( -14 ) - 19
= -15 + (-14) - 19
= -29-19
=-48
b) 221+4[(-5).8-4]
=221+4[-40-4]
=221+4.(-44)
=221+(-176)
=45
c) (-2)3.(-2)2+32
= (-8).4+32
= -32+32
= 0
d) -15 . 12 - 8 . ( -12 )
= -15 . 12 - ( -8 ) . 12
= 12 . [ -15 - (-8)]
= 12 . ( -7 )
= -84
U
20 tháng 8 2018
\(\frac{6}{5}-\frac{1}{4}+\frac{4}{5}-\frac{3}{4}\)
\(=\left(\frac{6}{5}+\frac{4}{5}\right)-\left(\frac{1}{4}+\frac{3}{4}\right)\)
\(=2-1\)
\(=1\)
\(\frac{7}{9}-\frac{5}{12}+\frac{2}{9}-\frac{7}{12}\)
\(=\left(\frac{7}{9}+\frac{2}{9}\right)-\left(\frac{5}{12}+\frac{7}{12}\right)\)
\(=1-1\)
\(=0\)
các câu sau tương tự
NM
9 tháng 9 2021
A=1
B=0
C=ÂM 8/15
D=0
E=2
F=3/2
H=2/3
LẦN SAU CHO KHÓ SÍU NHA LỚP 5 CŨNG LÀM ĐC
NN
2
PC
11 tháng 7 2019
a)-2-13+(-14)-19
= - 48
b) 221+4[(-5).8-4]
=221+4(-40-4)
=221+4(-44)
=221-176
=45
c)\(\left(-2\right)^3.\left(-2\right)^2+32\)
=\(-8\cdot4+32\)
\(=-32+32=0\)
d) \(-15\cdot12-8\cdot\left(-12\right)\)
\(=15\cdot\left(-12\right)-8\cdot\left(-12\right)\)
\(=\left(-12\right)\left(15-8\right)\)
\(=\left(-12\right)\cdot7\)
\(=-84\)
PJ
11 tháng 7 2019
a) -2 - 13 + (-14) - 19 = -48
b) 221 + 4\([\left(-5\right).8-4]\)= 45
c) (-2)3.(-2)2 + 32 = (-2)5 + 32 = -32 + 32 = 0
d) -15.12 - 8.(-12) = 15.(-12) - 8.(-12)
= (-12).(15 - 8)
= (-12).7 = -84
~ Học tốt ~
6/13:12=1/26
15:5/22=66
1/3:2/5:3/4=5/6:3/4=10/9
6/13 : 12 = \(\dfrac{6}{13}x\dfrac{1}{12}=\dfrac{1}{26}\)
15 : 5/22= \(15x\dfrac{22}{5}=66\)
1/3 : 2/5 : 3/4=\(\dfrac{1}{3}x\dfrac{5}{2}x\dfrac{4}{3}=\dfrac{10}{9}\)