Ôn tập toán 6
Các câu hỏi tương tự
Thực hiện phép tính bằng cách hợp lí :
\(B=1\dfrac{6}{41}\cdot\left(\dfrac{12+\dfrac{12}{9}-\dfrac{12}{37}-\dfrac{12}{53}}{3+\dfrac{1}{3}-\dfrac{3}{37}-\dfrac{3}{53}}:\dfrac{4+\dfrac{4}{17}+\dfrac{4}{19}+\dfrac{4}{2006}}{5+\dfrac{5}{17}+\dfrac{5}{19}+\dfrac{5}{2006}}\right)\cdot\dfrac{124242423}{237373735}\)
Bài tập: So sánh:
a, dfrac{12}{49}&dfrac{13}{47}
b,dfrac{64}{85}&dfrac{17}{35}
c,dfrac{19}{31}&dfrac{17}{35}
(Gợi ý: a,b,c: Phân số chung gian)
d,dfrac{67}{77}&dfrac{73}{83}
e,dfrac{456}{461}&dfrac{123}{128}
(Gợi ý: d, e:Phần bù đến đơn vị)
Đọc tiếp
Bài tập: So sánh:
a, \(\dfrac{12}{49}\&\dfrac{13}{47}\)
\(b,\dfrac{64}{85}\&\dfrac{17}{35}\)
\(c,\dfrac{19}{31}\&\dfrac{17}{35}\)
(Gợi ý: a,b,c: Phân số chung gian)
\(d,\dfrac{67}{77}\&\dfrac{73}{83}\)
\(e,\dfrac{456}{461}\&\dfrac{123}{128}\)
(Gợi ý: d, e:Phần bù đến đơn vị)
Bài 1: so sánh
a) dfrac{13}{17} và dfrac{25}{29}
b) dfrac{59}{101}vàdfrac{56}{105}
c)dfrac{14}{55}vàdfrac{20}{83}
d)dfrac{13}{57}vàdfrac{29}{73}
e)dfrac{17}{21}vàdfrac{1717}{2121}
Đọc tiếp
Bài 1: so sánh
a) \(\dfrac{13}{17}\) và \(\dfrac{25}{29}\)
b) \(\dfrac{59}{101}\)và\(\dfrac{56}{105}\)
c)\(\dfrac{14}{55}\)và\(\dfrac{20}{83}\)
d)\(\dfrac{13}{57}\)và\(\dfrac{29}{73}\)
e)\(\dfrac{17}{21}\)và\(\dfrac{1717}{2121}\)
So sánh : a, \(\dfrac{29}{60}và\dfrac{15}{28}\) b, \(\dfrac{13}{30}và\dfrac{23}{42}\) c, \(\dfrac{13}{36}và\dfrac{14}{45}\) d, \(\dfrac{1919}{9595}và\dfrac{1111}{5050}\)
Bài 3: So Sánh
a)dfrac{13}{17}vàdfrac{25}{29}
b)dfrac{59}{101}vàdfrac{56}{105}
c)dfrac{14}{55}vàdfrac{20}{83}
d)dfrac{13}{57}vàdfrac{29}{73}
e)dfrac{17}{21}vàdfrac{1717}{2121}
Đọc tiếp
Bài 3: So Sánh
a)\(\dfrac{13}{17}\)và\(\dfrac{25}{29}\)
b)\(\dfrac{59}{101}\)và\(\dfrac{56}{105}\)
c)\(\dfrac{14}{55}\)và\(\dfrac{20}{83}\)
d)\(\dfrac{13}{57}\)và\(\dfrac{29}{73}\)
e)\(\dfrac{17}{21}\)và\(\dfrac{1717}{2121}\)
a)dfrac{2}{7}+dfrac{-3}{8}+dfrac{11}{7}+dfrac{1}{7}_{ }+dfrac{5}{-8}
b)dfrac{3}{17}+dfrac{-5}{13}+dfrac{-18}{35}+dfrac{14}{17}+dfrac{17}{-35}_{ }+dfrac{-8}{13}
c)dfrac{-3}{8}+dfrac{12}{25}+dfrac{5}{-8}+dfrac{2}{-5}+dfrac{13}{25}
d)dfrac{-5}{21}+left(dfrac{-16}{21}+1right)
e)dfrac{-3}{17}+left(dfrac{2}{3}+dfrac{3}{17}right)
f)left(dfrac{-1}{6}+dfrac{5}{-12}right)+dfrac{7}{12}
Đọc tiếp
a)\(\dfrac{2}{7}+\dfrac{-3}{8}+\dfrac{11}{7}+\dfrac{1}{7}_{ }+\dfrac{5}{-8}\)
b)\(\dfrac{3}{17}+\dfrac{-5}{13}+\dfrac{-18}{35}+\dfrac{14}{17}+\dfrac{17}{-35}_{ }+\dfrac{-8}{13}\)
c)\(\dfrac{-3}{8}+\dfrac{12}{25}+\dfrac{5}{-8}+\dfrac{2}{-5}+\dfrac{13}{25}\)
d)\(\dfrac{-5}{21}+\left(\dfrac{-16}{21}+1\right)\)
e)\(\dfrac{-3}{17}+\left(\dfrac{2}{3}+\dfrac{3}{17}\right)\)
f)\(\left(\dfrac{-1}{6}+\dfrac{5}{-12}\right)+\dfrac{7}{12}\)
tính hợp lý giá trị các biểu thức sau :
B 71dfrac{38}{45} - ( 43dfrac{8}{45} - 1dfrac{17}{57} )
D ( 19dfrac{5}{8} : dfrac{7}{12} - 13dfrac{1}{4} : dfrac{7}{12} ) . dfrac{4}{5}
F ( 9,75 . 21dfrac{3}{7} + dfrac{39}{4} . 18dfrac{4}{7} ). dfrac{15}{78}
Đọc tiếp
tính hợp lý giá trị các biểu thức sau :
B= 71\(\dfrac{38}{45}\) - ( 43\(\dfrac{8}{45}\) - 1\(\dfrac{17}{57}\) )
D= ( 19\(\dfrac{5}{8}\) : \(\dfrac{7}{12}\) - 13\(\dfrac{1}{4}\) : \(\dfrac{7}{12}\) ) . \(\dfrac{4}{5}\)
F= ( 9,75 . 21\(\dfrac{3}{7}\) + \(\dfrac{39}{4}\) . 18\(\dfrac{4}{7}\) ). \(\dfrac{15}{78}\)
A= \(\dfrac{6}{19}.\dfrac{-7}{11}+\dfrac{6}{19}.\dfrac{-4}{11}+\dfrac{-13}{19}\); B=\(\dfrac{5}{7}.\dfrac{-4}{13}+\dfrac{5}{7}.\dfrac{7}{13}-\dfrac{5}{13}.\dfrac{3}{7}\)
bài 1 : so sánh :
a) dfrac{23}{21}vàdfrac{21}{23}
b)dfrac{19}{26}và dfrac{21}{25}
bài 2 : sắp sếp các phân số sau từ bé đến lớn :
a)dfrac{7}{36};dfrac{24}{36};dfrac{13}{36};dfrac{1}{36};dfrac{43}{36};dfrac{36}{36}
b)dfrac{-3}{10};dfrac{-31}{100};dfrac{-297}{1000};dfrac{10000}{-3056}
c)dfrac{13}{20};dfrac{7}{20};dfrac{9}{4};dfrac{2}{5};dfrac{1}{2}
d)dfrac{13}{21};dfrac{152}{17};dfrac{13}{17};dfrac{-5}{21}
e)dfrac{-1}{2};dfrac{3}{-4};dfrac{-2}{3};dfrac{4}{-5}
Đọc tiếp
bài 1 : so sánh :
a) \(\dfrac{23}{21}\)và\(\dfrac{21}{23}\)
b)\(\dfrac{19}{26}\)và \(\dfrac{21}{25}\)
bài 2 : sắp sếp các phân số sau từ bé đến lớn :
a)\(\dfrac{7}{36};\dfrac{24}{36};\dfrac{13}{36};\dfrac{1}{36};\dfrac{43}{36};\dfrac{36}{36}\)
b)\(\dfrac{-3}{10};\dfrac{-31}{100};\dfrac{-297}{1000};\dfrac{10000}{-3056}\)
c)\(\dfrac{13}{20};\dfrac{7}{20};\dfrac{9}{4};\dfrac{2}{5};\dfrac{1}{2}\)
d)\(\dfrac{13}{21};\dfrac{152}{17};\dfrac{13}{17};\dfrac{-5}{21}\)
e)\(\dfrac{-1}{2};\dfrac{3}{-4};\dfrac{-2}{3};\dfrac{4}{-5}\)