25/11:5/77
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e. = 12 - 25 + 38 + 25 - 38 + 88 - 250
= ( -25 + 25) + (38 - 38) + ( 12 + 88) - 250
= -150
f. = (-12).44 + 44.(-88)
= 44 ( -12 -88 )
= 44 . 100
= 4400
g. = -48 + 54 -77 -24 + 48 + 77
= (-48 + 48) + (-77+77) + (54 -24)
= 30
h. = 11.(-42) + 11.(-26) + 42.11 + 42.26 -26.11 - 42.26
= \([11.\left(-42\right)+11.42]+\left[11.\left(-26\right)-26.11\right]+[42.26-42.26]\)
= 11. (-52)
= - 572
\(e.-\left(-12+25-38\right)+\left(25-38+88\right)-250\\ =12-25+38+25-38+88-250\\ =\left(25-25\right)+\left(38-38\right)+\left(12+88\right)-250\\ =0+0+100-250=-150\)
\(f.\left(-12\right)\cdot\left(67-23\right)+44\cdot\left(-88\right)\\ =\left(-12\right)\cdot44+44\cdot\left(-88\right)\\ =44\cdot\left[-12+\left(-88\right)\right]\\ =44\cdot\left(-100\right)=-4400\)
\(g.\left(-48+54-77\right)-\left(24-48-77\right)\\ =-48+54-77-24+48+77\\ =\left(48-48\right)+\left(54-24\right)+\left(77-77\right)\\ =0+30+0=30\)
\(h.11\cdot\left(-42-26\right)+42\cdot\left(11+26\right)-26\cdot11-42\cdot26\\ =11\cdot\left(-68\right)+42\cdot37-26\cdot11-42\cdot26\\ =-748+1554-286-1092=-572\)
a: \(=\dfrac{1}{7}\cdot\dfrac{17}{5}-\dfrac{3}{2}\cdot\dfrac{2-7}{12}\)
\(=\dfrac{17}{35}-\dfrac{-15}{24}\)
\(=\dfrac{17}{35}+\dfrac{15}{24}=\dfrac{311}{280}\)
b: \(=\dfrac{25}{77}-\dfrac{3-7}{15}\cdot\dfrac{10}{11}:\dfrac{3}{4}\)
\(=\dfrac{25}{77}+\dfrac{4}{15}\cdot\dfrac{10}{11}\cdot\dfrac{4}{3}\)
\(=\dfrac{25}{77}+\dfrac{32}{99}=\dfrac{449}{693}\)
77 . 25 + 5 . 77 + 77 . 14 + 33 . 77
= 77. ( 25 + 5 + 14 + 33 )
= 77 . 77
= 772
= 5929
~ Hok tốt ~
77 . 25 + 5 . 77 + 77 . 14 + 33 . 77
=77 . (25 + 5 + 14 + 33)
=77 . 77
=5929
Chúc bn học tốt! Kick cho mik nha!
5.7.77-7.60+49.25-15.42
= 5.7.77-7.5.12+7.7.5.5-3.5-3.5.6.7
= 35.77-35.12+35.35-35.18
= 35.(77-12+35-18)
= 35.82
= 2870
Câu 1: (5-25)-(-17)+40
=-20-(-17)+40
=-37+40
=3
Câu 2: (-7)-[(-30)+27]+(-11)
=(-7)-(-3)+(-11)
=-10+(-11)
=-21
Câu 3: (-77)+13+77+100+(-13)
=-64+77+100+(-13)
=13+100+(-13)
=113+(-13)
=100
Câu 4: 9-18+[15-(-28)]
=9-18+-13
=-9+-13
=-22
X x (\(\dfrac{11}{5}\)+ \(\dfrac{4}{7}\)) = \(\dfrac{5}{77}\)
X x \(\dfrac{97}{35}\)=\(\dfrac{5}{77}\)
X = \(\dfrac{5}{77}:\dfrac{97}{35}\)
X = \(\dfrac{25}{1067}\)
Xx11/5-Xx4/7=5/77
Xx(11/5-4/7)=5/77
Xx57/35=5/77
x=5/77:57/35=25/627
\(\dfrac{25}{11}\): \(\dfrac{5}{77}\) = \(\dfrac{25}{11}\) \(\times\) \(\dfrac{77}{5}\) = 35
25/11:5/77= 25/11 x 77/5= 1925/55= 35