{"common":{"save":0,"post_id":"4823","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8362","post_id":"4823","mon_id":"1158113","chapter_id":"1158126","question":"<p>Trong ba s\u1ed1 sau có m\u1ed9t s\u1ed1 là k\u1ebft qu\u1ea3 c\u1ee7a phép tính <br \/><strong>26,28 + 35,67 + 5,69<\/strong>. B\u1eb1ng cách \u01b0\u1edbc l\u01b0\u1ee3ng em hãy cho bi\u1ebft s\u1ed1 \u0111ó là s\u1ed1 nào?<\/p>","options":["67,64","70,24","65,44","69,34"],"correct":"1","level":"2","hint":"<p>Làm tròn các s\u1ed1 h\u1ea1ng \u0111\u1ebfn hàng \u0111\u01a1n v\u1ecb \u0111\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng và ch\u1ecdn \u0111áp án g\u1ea7n nh\u1ea5t v\u1edbi s\u1ed1 \u0111\u01b0\u1ee3c \u01b0\u1edbc l\u01b0\u1ee3ng<\/p>","answer":"<p>Làm tròn các s\u1ed1 h\u1ea1ng \u0111\u1ebfn hàng \u0111\u01a1n v\u1ecb ta \u0111\u01b0\u1ee3c:<\/p><p> <strong>26,28 ≈ 26 <\/strong><\/p><p><strong> 35,67 ≈ 36<\/strong><\/p><p><strong> 5,69 ≈ 6<\/strong><\/p><p>Vì 26 + 36 + 6 = 68 (g\u1ea7n v\u1edbi s\u1ed1 67,64 nh\u1ea5t) nên <strong>26,28 + 35,67 + 5,69 = <span style=\"color:#16a085;\">67,64<\/span><\/strong><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><b> 67,64<\/b><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-10-05 01:35:24","option_type":"txt","len":0},{"id":"8364","post_id":"4823","mon_id":"1158113","chapter_id":"1158126","question":"<p>S\u1ed1 ti\u1ec1n trên hóa \u0111\u01a1n trong m\u1ed9t l\u1ea7n \u0111i siêu th\u1ecb c\u1ee7a m\u1eb9 Lan là <\/p><p>752 800 \u0111\u1ed3ng. H\u1ecfi trên th\u1ef1c t\u1ebf, m\u1eb9 Lan ph\u1ea3i tr\u1ea3 bao nhiêu ti\u1ec1n?<\/p>","options":["752 000 \u0111\u1ed3ng","753 000 \u0111\u1ed3ng","753 800 \u0111\u1ed3ng"],"correct":"2","level":"2","hint":"<p>Làm tròn s\u1ed1 ti\u1ec1n \u0111\u1ebfn hàng nghìn.<\/p>","answer":"<p>Vì s\u1ed1 752 800 làm tròn \u0111\u1ebfn hàng nghìn \u0111\u01b0\u1ee3c s\u1ed1 753 000 nên trên th\u1ef1c t\u1ebf m\u1eb9 Lan ph\u1ea3i tr\u1ea3 s\u1ed1 ti\u1ec1n là <span style=\"color:#16a085;\">753 000 \u0111\u1ed3ng<\/span>.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>753 000 \u0111\u1ed3ng<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-10-05 01:39:38","option_type":"txt","len":1},{"id":"8367","post_id":"4823","mon_id":"1158113","chapter_id":"1158126","question":"<p>Ch\u1ecdn nh\u1eefng phép làm tròn \u0111\u1ebfn hàng tr\u0103m <strong>\u0111úng<\/strong><\/p>","options":["<strong>A.<\/strong> 7 596 ≈ 7 600","<strong>B.<\/strong> 21 567 ≈ 21 600","<strong>C. <\/strong>-829 ≈ -800","<strong>D. <\/strong>-628 ≈ -600"],"correct":"[\"1\",\"2\",\"3\",\"4\"]","level":"2","hint":"<p>- \u0110\u1ed1i v\u1edbi ch\u1eef s\u1ed1 hàng làm tròn:<\/p><p>+ Gi\u1eef nguyên n\u1ebfu ch\u1eef s\u1ed1 ngay bên ph\u1ea3i nh\u1ecf h\u01a1n 5<\/p><p>+ C\u1ed9ng thêm 1 \u0111\u01a1n v\u1ecb n\u1ebfu ch\u1eef s\u1ed1 ngay bên ph\u1ea3i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5<\/p><p>- \u0110\u1ed1i v\u1edbi các ch\u1eef s\u1ed1 sau hàng làm tròn:<\/p><p>+ B\u1ecf \u0111i n\u1ebfu \u1edf ph\u1ea7n th\u1eadp phân<\/p><p>+ Thay b\u1eb1ng các ch\u1eef s\u1ed1 0 n\u1ebfu \u1edf ph\u1ea7n s\u1ed1 nguyên<\/p>","answer":"<p><strong>A.<\/strong> 7 596 ≈ 7 600 (\u0111úng)<\/p><p><strong>B.<\/strong> 21 567 ≈ 21 600 (\u0111úng)<\/p><p><strong>C. <\/strong>-829 ≈ -800 (\u0111úng)<\/p><p><strong>D. <\/strong>-628 ≈ -600 (\u0111úng)<\/p><p>Nh\u01b0 v\u1eady c\u1ea3 b\u1ed1n \u0111áp án \u0111\u1ec1u \u0111úng<\/p><p>Các \u0111áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>A.<\/strong> 7 596 ≈ 7 600 ; <strong>B.<\/strong> 21 567 ≈ 21 600 ; <strong>C. <\/strong>-829 ≈ -800 ; <strong>D. <\/strong>-628 ≈ -600 <\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"131","test":"1","date":"2021-10-05 01:46:31","option_type":"txt","len":2}]}