Tập hợp các số hữu tỉ - Bài tập trung bình

Home Lớp 7 Toán lớp 7 - Sách kết nối tri thức Bài 1: Tập hợp các số hữu tỉBài tập trung bình

{"common":{"save":0,"post_id":"5637","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6712","post_id":"5637","mon_id":"1158532","chapter_id":"1158544","question":"Nh\u1eefng kh\u1eb3ng \u0111\u1ecbnh nào là \u0111úng?<\/p>","options":["A.<\/strong> - 10 ∈ Q","B.<\/strong> -2<\/span>3<\/span><\/span> ∈ Q","C.<\/strong> -9,8 ∉ Q","D.<\/strong> 0 ∉ Q<\/span><\/span>"],"correct":"[\"1\",\"2\"]","level":"2","hint":"S\u1ed1 h\u1eefu t\u1ec9 là s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng phân s\u1ed1   v\u1edbi a, b ∈ Z, b $\\ne$<\/span> 0.<\/p>S\u1ed1 nguyên, h\u1ed7n s\u1ed1, s\u1ed1 th\u1eadp phân c\u0169ng là các s\u1ed1 h\u1eefu t\u1ec9.<\/p>","answer":"A. <\/strong>  - 10 ∈ Q  (\u0111úng vì -10 =  -10<\/span>1<\/span><\/span> )<\/p>B.  <\/strong>-2<\/span>3<\/span><\/span> ∈ Q  (\u0111úng)<\/p>C.<\/strong> -9,8 ∉ Q  (sai vì -9,8 là m\u1ed9t s\u1ed1 h\u1eefu t\u1ec9)<\/p>D.<\/strong> 0 ∉ Q  (sai vì 0 là m\u1ed9t s\u1ed1 h\u1eefu t\u1ec9)<\/p>Các \u0111áp án \u0111úng là  A. <\/strong>  - 10 ∈ Q   và    B.<\/strong>  -2<\/span>3<\/span><\/span> ∈ Q<\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"131","test":"1","date":"2022-03-27 02:43:27","option_type":"math","len":0},{"id":"6735","post_id":"5637","mon_id":"1158532","chapter_id":"1158544","question":"\u0110i\u1ec3m D trong hình bi\u1ec3u di\u1ec5n s\u1ed1 h\u1eefu t\u1ec9 nào?<\/p><svg height=\"120\" width=\"400\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g><title><\/title><rect fill=\"#fff\" height=\"122\" id=\"canvas_background\" width=\"402\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><image height=\"92\" id=\"svg_1\" stroke=\"null\" width=\"396\" x=\"0.5\" 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y=\"15\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["A. <\/strong>$\\dfrac{1}{6}$<\/span>","B.<\/strong> $-\\dfrac{1}{3}$<\/span>","C. <\/strong>$-\\dfrac{5}{6}$<\/span>","D.<\/strong> $\\dfrac{7}{6}$<\/span>"],"correct":"1","level":"2","hint":"M\u1ed9t \u0111\u01a1n v\u1ecb c\u0169 \u0111\u01b0\u1ee3c chia thành 6 ph\u1ea7n b\u1eb1ng nhau nên m\u1ed9t \u0111\u01a1n v\u1ecb m\u1edbi b\u1eb1ng $ \\dfrac{1}{6} $<\/span> \u0111\u01a1n v\u1ecb c\u0169.<\/p>","answer":"M\u1ed9t \u0111\u01a1n v\u1ecb c\u0169 \u0111\u01b0\u1ee3c chia thành 6 ph\u1ea7n b\u1eb1ng nhau nên m\u1ed9t \u0111\u01a1n v\u1ecb m\u1edbi b\u1eb1ng $ \\dfrac{1}{6} $<\/span> \u0111\u01a1n v\u1ecb c\u0169.<\/p>Vì \u0111i\u1ec3m D n\u1eb1m sau g\u1ed1c O và cách O m\u1ed9t \u0111o\u1ea1n b\u1eb1ng m\u1ed9t \u0111\u01a1n v\u1ecb m\u1edbi nên \u0111i\u1ec3m D bi\u1ec3u di\u1ec5n s\u1ed1 h\u1eefu t\u1ec9 $\\dfrac{1}{6}$<\/span> \u0110áp án \u0111úng là  A.<\/strong> $\\dfrac{1}{6}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-03-28 08:25:35","option_type":"math","len":0},{"id":"6737","post_id":"5637","mon_id":"1158532","chapter_id":"1158544","question":"So sánh hai s\u1ed1 h\u1eefu t\u1ec9 sau : -0,4  và  -0,45<\/p>","options":["A. <\/strong>-0,4 < -0,45","B.<\/strong> -0,4 > -0,45","C.<\/strong> -0,4 = -0,45 ","D.<\/strong> -0,45 > -0,4"],"correct":"2","level":"2","hint":"So sánh nh\u01b0 so sánh hai s\u1ed1 th\u1eadp phân.<\/p>","answer":"Ta có -0,4 > -0,45. \u0110áp án \u0111úng là   B.<\/strong> -0,4 > -0,45<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-03-28 08:31:36","option_type":"txt","len":2}]}