Ôn tập toán chuyển động đều

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 73. Ôn tập toán chuyển động đềuBài tập trung bình

{"common":{"save":0,"post_id":"9123","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5191","post_id":"9123","mon_id":"1159414","chapter_id":"1159500","question":"Lúc 6 gi\u1edd sáng, m\u1ed9t ô tô \u0111i t\u1eeb A \u0111\u1ebfn B v\u1edbi v\u1eadn t\u1ed1c 63 km\/h. Bi\u1ebft A cách B 12,6 km. H\u1ecfi ô tô \u0111\u1ebfn B lúc m\u1ea5y gi\u1edd?<\/p>","options":["A.<\/strong> 6 gi\u1edd 15 phút.","B.<\/strong> 7 gi\u1edd 12 phút.","C.<\/strong> 6 gi\u1edd 12 phút.","D.<\/strong> 7 gi\u1edd 15 phút."],"correct":"3","level":"2","hint":"","answer":"Ch\u1ecdn C.<\/strong> 6 gi\u1edd 12 phút.<\/span><\/p>Th\u1eddi gian ô tô \u0111i t\u1eeb A \u0111\u1ebfn B là 12,6 : 63 = 0,2 (gi\u1edd) = 12 (phút).<\/p>Ô tô \u0111\u1ebfn B lúc 6 gi\u1edd + 12 phút = 6 gi\u1edd 12 phút.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-05-01 10:07:51","option_type":"txt","len":2},{"id":"5193","post_id":"9123","mon_id":"1159414","chapter_id":"1159500","question":"T\u1eeb lúc 7 gi\u1edd 50 phút \u0111\u1ebfn 8 gi\u1edd 15 phút, m\u1ed9t xe máy \u0111i t\u1eeb A \u0111\u1ebfn B cách nhau 15 km. Tính v\u1eadn t\u1ed1c c\u1ee7a xe máy theo \u0111\u01a1n v\u1ecb km\/h).<\/p>","options":["A.<\/strong> 10 km\/h.","B.<\/strong> 36 km\/h.","C.<\/strong> 30 km\/h.","D.<\/strong> 20 km\/h."],"correct":"2","level":"2","hint":"","answer":"Ch\u1ecdn B.<\/strong> 36 km\/h.<\/span><\/p>Th\u1eddi gian xe máy \u0111i t\u1eeb A \u0111\u1ebfn B là:<\/p>8 gi\u1edd 15 phút – 7 gi\u1edd 50 phút = 25 (phút) = $\\dfrac{25}{60}$<\/span> (gi\u1edd) = $\\dfrac{5}{12}$<\/span> (gi\u1edd).<\/p>V\u1eadn t\u1ed1c c\u1ee7a xe máy là:<\/p>15 : $\\dfrac{5}{12}$<\/span> = 15 x $\\dfrac{12}{5}$<\/span> = 36 (km\/h).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-05-01 10:13:39","option_type":"txt","len":1},{"id":"5195","post_id":"9123","mon_id":"1159414","chapter_id":"1159500","question":"M\u1ed9t v\u1eadn \u0111\u1ed9ng viên b\u01a1i t\u1eeb \u0111\u1ea7u b\u1ec3 b\u01a1i \u0111\u1ebfn cu\u1ed1i b\u1ec3 r\u1ed3i quay v\u1ec1 \u0111\u1ea7u b\u1ec3 h\u1ebft 50 giây. Bi\u1ebft b\u1ec3 có chi\u1ec1u dài 50 m. Tính v\u1eadn t\u1ed1c b\u01a1i c\u1ee7a v\u1eadn \u0111\u1ed9ng viên \u0111ó.<\/p>","options":["A.<\/strong> 1 m\/s.","B.<\/strong> 1,5 m\/s.","C.<\/strong> 2 m\/s.","D.<\/strong> 2,5 m\/s."],"correct":"3","level":"2","hint":"","answer":"Ch\u1ecdn C.<\/strong> 2 m\/s.<\/span><\/p>Quãng \u0111\u01b0\u1eddng v\u1eadn \u0111\u1ed9ng viên b\u01a1i t\u1eeb \u0111\u1ea7u b\u1ec3 b\u01a1i \u0111\u1ebfn cu\u1ed1i b\u1ec3 r\u1ed3i quay v\u1ec1 \u0111\u1ea7u b\u1ec3 b\u01a1i là:<\/p>50 x 2 = 100 (m).<\/p>V\u1eadn t\u1ed1c b\u01a1i c\u1ee7a v\u1eadn \u0111\u1ed9ng viên là:<\/p>100 : 50 = 2 (m\/s).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-05-01 10:23:10","option_type":"txt","len":1}]}