Phép nhân số nguyên - Bài tập trung bình

Home Lớp 6 Toán lớp 6 - Sách kết nối tri thức Bài 16: Phép nhân số nguyênBài tập trung bình

{"common":{"save":0,"post_id":"4510","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6196","post_id":"4510","mon_id":"1158113","chapter_id":"1158128","question":"So sánh:<\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/do-an\/banh4.png\" \/><\/div>(-234) . (-145) <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> (-10000) . 999<\/p>(-785) . (-919) <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> 919 . 785<\/p>(+13). (+12) <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> (+11967). (-72)<\/p>","options":"","correct":["[\">\",\"=\",\">\"]"],"level":"2","hint":"So sánh các tích \u1ea5y thông qua s\u1ed1 0.<\/p>","answer":"Ta có: <\/p>(-234) . (-145) ><\/span> (-10000) . 999  vì (-234) . (-145) > 0 và (-10000) . 999 < 0.<\/p>(-785) . (-919) =<\/span> 919 . 785          vì (-785) . (-919) = 785 . 919 = 919 . 785.<\/p>(+13). (+12) > <\/span>(+11967). (-72)     vì (+13). (+12) > 0 và (+11967). (-72) < 0.<\/p>V\u1eady \u0111áp án l\u1ea7n l\u01b0\u1ee3t là > ; = ; ><\/strong><\/span><\/p>","type":"blank","extra_type":"","time":"0","user_id":"132","test":"3","date":"2021-08-21 14:16:15"},{"id":"6197","post_id":"4510","mon_id":"1158113","chapter_id":"1158128","question":"Tính giá tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c sau t\u1ea1i x= -15<\/p>P = 125 . x .(-8)<\/p>","options":["P= 15000","P = -15000","P = -1000","P= 120"],"correct":"1","level":"2","hint":"Thay x = -15 vào bi\u1ec3u th\u1ee9c r\u1ed3i tính m\u1ed9t cách h\u1ee3p lí.<\/p>","answer":"T\u1ea1i x= -15, ta có:<\/p>P = 125 . (-15) . (-8)<\/p>    = 125 . 15 . 8<\/p>    = (125 . 8) .15<\/p>    = 15000<\/p>V\u1eady ch\u1ecdn P=15000<\/span><\/strong><\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"132","test":"3","date":"2021-08-21 14:22:14","option_type":"txt","len":0},{"id":"6198","post_id":"4510","mon_id":"1158113","chapter_id":"1158128","question":"Hai ca nô cùng xu\u1ea5t phát t\u1eeb C \u0111i v\u1ec1 phía A ho\u1eb7c B nh\u01b0 hình v\u1ebd. Ta quy \u01b0\u1edbc chi\u1ec1u d\u01b0\u01a1ng t\u1eeb C \u0111\u1ebfn B (ngh\u0129a là v\u1eadn t\u1ed1c và quãng \u0111\u01b0\u1eddng t\u1eeb C v\u1ec1 phía B \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng s\u1ed1 d\u01b0\u01a1ng và theo chi\u1ec1u ng\u01b0\u1ee3c l\u1ea1i là s\u1ed1 âm). H\u1ecfi sau hai gi\u1edd hai ca nô cách nhau bao nhiêu kilômét n\u1ebfu v\u1eadn t\u1ed1c c\u1ee7a chúng l\u1ea7n l\u01b0\u1ee3t là: 11km\/h và -6km\/h<\/p><svg height=\"50\" width=\"200\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g><title><\/title><rect fill=\"#fff\" height=\"52\" id=\"canvas_background\" width=\"202\" 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=\"49\" id=\"svg_1\" width=\"260\" x=\"-21\" 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suhN8lue5V859NzC0\/9Y5vdWT\/yTrCIbpgtb6FsHZc4IQCAT2DrtLngKBwFgJghAIBEYEQQgEAiOCIAQCgRFBEAKBwIggCIFAYEQQhEAgMCIIQiAQGBEEIRAIjAiCEAgERgRBCAQCI4IgBAKBEUEQAoHAiCAIgUBgxP8A+m4\/Z8kd9aEAAAAASUVORK5CYII=\" y=\"1.5\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["A.<\/strong> 34 km\/h","B.<\/strong> 17 km","C.<\/strong> 34 km","D.<\/strong> 17 km\/h"],"correct":"3","level":"2","hint":"Tính quãng \u0111\u01b0\u1eddng mà hai ca nô \u0111i \u0111\u01b0\u1ee3c sau hai gi\u1edd (quãng \u0111\u01b0\u1eddng = v\u1eadn t\u1ed1c . th\u1eddi gian)<\/p>Sau \u0111ó l\u1ea5y s\u1ed1 l\u1edbn tr\u1eeb \u0111i s\u1ed1 nh\u1ecf.<\/p>","answer":"Sau 2 gi\u1edd quãng \u0111\u01b0\u1eddng mà hai ca nô \u0111i \u0111\u01b0\u1ee3c l\u1ea7n l\u01b0\u1ee3t là:<\/p>11 . 2 = 22 (km)<\/p>(-6) . 2 = -12 (km)<\/p>Kho\u1ea3ng cách gi\u1eefa hai ca nô sau 2 gi\u1edd là: 22 - (-12) = 34 (km)<\/p>V\u1eady ch\u1ecdn \u0111áp án C. 34 km<\/span><\/strong><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-08-21 14:33:43","option_type":"txt","len":0}]}