[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 2: B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh v\u00e0 h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh m\u1ed9t \u1ea9n<\/a><\/blockquote>