Ôn tập phép tính với số tự nhiên

Home Lớp 4 Toán lớp 4 - Sách Kết nối tri thức Bài 68. Ôn tập phép tính với số tự nhiênBài tập nâng cao

{"common":{"save":0,"post_id":"6905","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"2744","post_id":"6905","mon_id":"1159012","chapter_id":"1159027","question":"Tính b\u1eb1ng cách thu\u1eadn ti\u1ec7n.<\/p>9999 x 14 + 14<\/p>","options":["A.<\/strong> 14 000","B.<\/strong> 150 000","C.<\/strong> 104 000","D.<\/strong> 140 000"],"correct":"4","level":"3","hint":"9999 x 14 + 14<\/span><\/p>= 9999 x 14 + 1 x 14<\/span><\/p>= ... <\/p>","answer":"9999 x 14 + 14<\/p>= 9999 x 14 + 1 x 14<\/p>= (9999 + 1) x 14<\/p>= 10 000 x 14<\/p>= 140 000<\/p>Ch\u1ecdn D.<\/strong> 140 000<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-14 01:38:48","option_type":"txt","len":0},{"id":"2745","post_id":"6905","mon_id":"1159012","chapter_id":"1159027","question":"Tính b\u1eb1ng cách thu\u1eadn ti\u1ec7n.<\/p>145 x 999 + 145<\/p>= 145 x (999 + <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/>)<\/p>= 145 x <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p>= <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p>","options":"","correct":["[\"1\",\"1000\",\"145 000\"]"],"level":"3","hint":"145 x 999 + 145<\/p>= 145 x 999 + 145 x 1<\/p>= ...<\/p>","answer":"145 x 999 + 145<\/p>= 145 x (999 + 1<\/strong><\/span>)<\/p>= 145 x 1000<\/strong><\/span><\/p>= 145 000<\/strong><\/span><\/p>Các s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t là 1 ; 1000 ; 145 000<\/strong><\/span><\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"0","date":"2024-02-14 01:43:21"},{"id":"2748","post_id":"6905","mon_id":"1159012","chapter_id":"1159027","question":"N\u1ed1i các phép tính có k\u1ebft qu\u1ea3 b\u1eb1ng nhau.<\/p>","options":[["45 x 12 + 18 x 45","89 + 26 + 11 + 74","145 x 29 – 29 x 45","67 + 45 + 55 + 33"],["= (89 + 11) + (26 + 74)","= 29 x (145 – 45)","= 45 x (12 + 18)","= (67 + 33) + (45 + 55)"],["= 45 x (12 + 18)","= (89 + 11) + (26 + 74)","= 29 x (145 – 45)","= (67 + 33) + (45 + 55)"]],"correct":[1,2,0,3],"level":"3","hint":"","answer":"45 x 12 + 18 x 45 = 45 x (12 + 18)<\/span><\/p>89 + 26 + 11 + 74 = (89 + 11) + (26 + 74)<\/span><\/p>145 x 29 – 29 x 45 = 29 x (145 – 45)<\/span><\/p>67 + 45 + 55 + 33 = (67 + 33) + (45 + 55)<\/span><\/p>","type":"matching","extra_type":"mat_txt","time":"0","user_id":"131","test":"0","date":"2024-02-14 01:49:41"}]}