a) − 12 17 < − 11 17 < − 10 17 < − 9 17 < − 8 17
b) 5 11 < 6 11 < 7 11 < 8 11 < 9 11
a) − 12 17 < − 11 17 < − 10 17 < − 9 17 < − 8 17
b) 5 11 < 6 11 < 7 11 < 8 11 < 9 11
Tính một cách hợp lý : \(\dfrac{5}{17}.\dfrac{7}{11}+\dfrac{5}{17}.\dfrac{4}{11}+\dfrac{-12}{17}\) là
A. \(\dfrac{17}{-17}\) B. \(\dfrac{8}{17}\)
C. \(\dfrac{-7}{17}\) D. \(-\dfrac{-7}{17}\)
a) -5/11 + ( -6/11 + 1 )
b) -13/17 + ( 13/-21 + -4/17 )
c) -5/12 . 7/-17 . 9/-20
d) 13/17 . 4/-5 + 13/17 . -3/4
e) -5/7 . 2/11 + -5/7 . 9/11 + 5/7
f) -2/5 . (-6) + 3/4 . 4/-10
a) 1/2 - 5/6 + 11/33 - 35/40
b) 2/3 . 1 3/4 - 8/9 - 17/51 - 1/5
c) 1/2 . 2 - 2 5/7 + 6/4 - 10/15
d) 1/6 . 1/11 + 4/11 . ( -1/6) + 8/11 . 1/6 + 1/6 . 6/11
e) -17 . (-23) + (-53) . 17 +17 . 14 + 17 .(-24)
f) -19,218 + (-82) .19 - 533 . 19 + (-19) . 167
g) 2/5 + 3/8 - 11/44 + 9/16
h) 4/10 - 1 5/6 . 2 + 7/8 -1/9
i ) 3. 1/5 - 2/8 - 12/36 + 15/9
k) 6/8 . 3 1/2 + 4 2/3 - 11/55 + 17/51
l ) 1/3 . 3 1/2 - 4 2/5 - 26/78 + 17/51
C = \(\dfrac{4}{9}\)\(\times\)\(\dfrac{13}{17}\)+\(\dfrac{4}{17}\)\(\times\)\(\dfrac{4}{9}\)+\(\dfrac{2}{9}\)
D = \(\dfrac{8}{19}\)\(\times\)\(\dfrac{5}{11}\)+\(\dfrac{7}{11}\)\(\times\dfrac{8}{19}+\dfrac{12}{11}\times\dfrac{11}{19}\)
a) -5/12 . 7/-17 . 9/-20
b) 13/17 . 4/-5 + 13/17 . -3/4
c)-5/7 . 2/11 + -5/7 . 9/11 + 5/7
d)-2/5 . (-6) + 3/4 . 4/-10
Đặt dấu ngoặc thích hợp rồi tính: 17-16+15+14-13+12-11-10+9-8+7+6-5
Cho tập hợp C = {11; 15; 17}. Hãy điền một kí hiệu thích hợp vào ô vuông
11 □ C 11 ; 17 □ C 12 □ C 11 □ C ∅ □ C 11 ; 15 ; 17 □ C
Điền số thích hợp vào ô vuông:
a) 26 39 = 2
b) 120 = − 5 6
c) 162 = − 2 3
d) 11 − 17 = 221