L\u00f4 \u0111ang l\u00e0 m\u1ed9t trong nh\u1eefng h\u00ecnh th\u1ee9c c\u00e1 c\u01b0\u1ee3c \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u anh em theo \u0111\u1ed5i hi\u1ec7n nay. Nh\u1ea5t l\u00e0 c\u00e1ch t\u00ednh l\u00f4 theo gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111em l\u1ea1i cho anh em m\u1ed9t s\u1ed1 ti\u1ec1n th\u01b0\u1edfng v\u00f4 c\u00f9ng l\u1edbn. Nh\u01b0ng nhi\u1ec1u anh em hi\u1ec7n nay, d\u00f9 l\u00e0 m\u1edbi ch\u01a1i hay \u0111\u00e3 ch\u01a1i l\u00e2u v\u1eabn ch\u01b0a bi\u1ebft c\u00e1ch t\u00ednh nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n
T\u00ednh l\u00f4 r\u01a1i t\u1eeb gi\u1ea3i \u0111\u1eb7c bi\u1ec7t<\/strong><\/span><\/h2>\nTr\u01b0\u1edbc khi c\u00e1c anh em mu\u1ed1n bi\u1ebft \u0111\u01b0\u1ee3c c\u00e1ch t\u00ednh l\u00f4 r\u01a1i t\u1eeb gi\u1ea3i \u0111\u1eb7c bi\u1ec7t th\u00ec anh em ph\u1ea3i hi\u1ec3u \u0111\u01b0\u1ee3c chi ti\u1ebft v\u1ec1 l\u00f4 r\u01a1i. V\u00e0 anh em ph\u1ea3i bi\u1ebft c\u00e1ch b\u1eaft l\u00f4 r\u01a1i<\/strong>. T\u1eeb \u0111\u00f3 anh em s\u1ebd v\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c c\u00e1ch t\u00ednh l\u00f4 r\u01a1i t\u1eeb gi\u1ea3i \u0111\u1eb7c m\u1ed9t c\u00e1ch v\u00f4 c\u00f9ng d\u1ec5 d\u00e0ng.<\/p>\nC\u00e1ch t\u00ednh l\u00f4 r\u01a1i t\u1eeb gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p v\u00f4 c\u00f9ng \u0111\u01a1n gi\u1ea3n. Nh\u01b0ng n\u00f3 l\u1ea1i \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 c\u1ef1c k\u1ef3 cao. C\u00e1ch t\u00ednh kh\u00f4ng c\u00f3 g\u00ec l\u00e0 qu\u00e1 kh\u00f3. Anh em ch\u1ec9 c\u1ea7n \u0111\u1ec3 \u00fd v\u00e0 quan s\u00e1t k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 m\u1ed9t ch\u00fat l\u00e0 c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c con l\u00f4 r\u01a1i t\u1eeb gi\u1ea3i \u0111\u1eb7c bi\u1ec7t.<\/p>\n
Th\u01b0\u1eddng c\u00f3 2 lo\u1ea1i l\u00f4 r\u01a1i l\u00e0 r\u01a1i t\u1eeb \u0111\u1ec1 v\u00e0 r\u01a1i t\u1eeb l\u00f4. B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u1ee5 th\u1ec3 ch\u00fang t\u1ea1i b\u00e0i vi\u1ebft: C\u00e1ch b\u1eaft l\u00f4 r\u01a1i<\/em><\/p>\nC\u00e1ch t\u00ednh l\u00f4 theo gi\u1ea3i \u0111\u1eb7c bi\u1ec7t b\u1eb1ng t\u1ed5ng<\/strong><\/span><\/h2>\n\u0110\u00e1nh l\u00f4 theo t\u1ed5ng c\u1ee7a 5 s\u1ed1 \u1edf gi\u1ea3i \u0111\u1eb7c bi\u1ec7t<\/strong><\/span><\/h3>\nC\u00e1ch t\u00ednh l\u00f4 theo gi\u1ea3i \u0111\u1eb7c bi\u1ec7t m\u00e0 c\u1ed9ng t\u1ed5ng c\u1ee7a 5 s\u1ed1 l\u1ea1i v\u1edbi nhau \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 r\u1ea5t l\u1edbn. Theo nh\u01b0 c\u00e1c chuy\u00ean gia l\u00f4 c\u1ee7a ch\u00fang t\u00f4i t\u1ed5ng h\u1ee3p. C\u00e1ch \u0111\u00e1nh n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u c\u00e1c anh em ch\u01a1i l\u00e2u n\u0103m \u00e1p d\u1ee5ng. V\u00e0 \u0111em l\u1ea1i t\u1ec9 l\u1ec7 tr\u00fang v\u00f4 c\u00f9ng cao.<\/p>\n
\u01afu \u0111i\u1ec3m c\u1ee7a c\u00e1ch n\u00e0y l\u00e0 kh\u1ea3 n\u0103ng v\u1ec1 r\u1ea5t cao. C\u00e1ch t\u00ednh n\u00e0y c\u00f2n c\u1ef1c k\u1ef3 \u0111\u01a1n gi\u1ea3n. V\u00e0 th\u00edch h\u1ee3p cho nh\u1eefng anh em m\u1edbi ch\u01a1i ch\u01b0a c\u00f3 nhi\u1ec1u kinh nghi\u1ec7m v\u00e0 v\u1ed1n c\u00f2n kh\u00e1 \u00edt. V\u1edbi c\u00e1ch n\u00e0y anh em v\u1eeba c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c th\u1eddi gian m\u00e0 v\u1eeba c\u00f3 th\u1ec3 \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 cao. C\u00e1ch t\u00ednh r\u1ea5t d\u1ec5 anh em ch\u1ec9 c\u1ea7n c\u1ed9ng t\u1ed5ng 5 s\u1ed1 \u1edf gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u1ea1i v\u1edbi nhau. Sau \u0111\u00f3 l\u1ea5y s\u1ed1 t\u1ed5ng m\u00e0 ch\u00fang ta c\u1ed9ng \u0111\u01b0\u1ee3c t\u1eeb gi\u1ea3i \u0111\u1eb7c sang \u0111\u00e1nh l\u00f4.<\/p>\n
V\u00ed d\u1ee5:<\/p>\n
Gi\u1ea3i \u0111\u1eb7c bi\u1ec7t ng\u00e0y h\u00f4m nay v\u1ec1 l\u00e0: 23119<\/p>\n
Anh em l\u1ea5y 2 + 3 + 1 + 1 + 9 = 16. L\u00fac n\u00e0y anh em l\u1ea5y s\u1ed1 16 v\u00e0 61 n\u00e0y \u0111i \u0111\u00e1nh l\u00f4.<\/p>\n
Tuy nhi\u00ean v\u1edbi c\u00e1ch n\u00e0y ch\u00fang t\u00f4i khuy\u00ean c\u00e1c b\u1ea1n r\u1eb1ng ch\u1ec9 nu\u00f4i trong 7 ng\u00e0y. Qu\u00e1 th\u1eddi gian th\u00ec anh em n\u00ean \u0111\u1ed5i sang t\u1ed5ng kh\u00e1c. Th\u01b0\u1eddng th\u01b0\u1eddng th\u00ec 2 \u2013 5 ng\u00e0y th\u00ec anh em h\u00e3y \u0111\u1ed5i s\u1ed1.<\/p>\n
Ghi l\u00f4 theo t\u1ed5ng \u0111\u1ec1<\/strong><\/span><\/h3>\n\u0110\u1ec3 c\u00f3 th\u1ec3 soi c\u1ea7u l\u00f4 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. Th\u00ec ghi l\u00f4 theo t\u1ed5ng \u0111\u1ec1 c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh x\u00e1c nh\u1ea5t hi\u1ec7n nay. V\u1edbi c\u00e1ch ghi l\u00f4 n\u00e0y, anh em c\u1ea7n d\u1ef1a theo b\u1ea3ng t\u1ed5ng h\u1ee3p k\u1ebft qu\u1ea3 ch\u01a1i \u0111\u1ec1 \u0111\u00e3 c\u00f3 tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n
Sau \u0111\u00f3, t\u1ea1i gi\u1ea3i \u0111\u1eb7c bi\u1ec7t, ta s\u1ebd c\u00f3 gi\u1ea3i ph\u00e1p t\u00ednh t\u1ed5ng \u0111\u1ec1 \u0111\u1ec3 \u0111\u01b0a ra nh\u1eefng con s\u1ed1 t\u1ed5ng. \u0110\u00e2y s\u1ebd s\u1ed1 l\u00f4 c\u00f3 x\u00e1c su\u1ea5t tr\u00fang cao nh\u1ea5t trong ng\u00e0y 1 \u2013 2 ng\u00e0y t\u1edbi. C\u00e1ch ch\u01a1i n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 v\u00f4 c\u00f9ng \u0111\u01a1n gi\u1ea3n nh\u01b0ng l\u1ea1i \u0111em l\u1ea1i x\u00e1c su\u1ea5t tr\u00fang t\u01b0\u01a1ng \u0111\u1ed1i cao. B\u1edfi ch\u1ec9 c\u1ea7n d\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 c\u1ee7a s\u1ed1 \u0111\u1ec1 \u0111\u00e3 ra. \u00c1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p t\u00ednh t\u1ed5ng \u0111\u1ec1 l\u00e0 anh em \u0111\u00e3 c\u00f3 th\u1ec3 s\u1edf h\u1eefu ngay cho m\u00ecnh con l\u00f4 \u0111\u1eb9p<\/p>\n
V\u00ed d\u1ee5: Gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111\u1ec1 h\u00f4m nay v\u1ec1 10221. Anh em c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p t\u00ednh t\u1ed5ng \u0111\u1ec1 h\u00ecn qu\u1ea3 tr\u00e1m nh\u01b0 sau<\/p>\n
C\u00e1ch t\u00ednh l\u00f4 r\u01a1i t\u1eeb gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p v\u00f4 c\u00f9ng \u0111\u01a1n gi\u1ea3n. Nh\u01b0ng n\u00f3 l\u1ea1i \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 c\u1ef1c k\u1ef3 cao. C\u00e1ch t\u00ednh kh\u00f4ng c\u00f3 g\u00ec l\u00e0 qu\u00e1 kh\u00f3. Anh em ch\u1ec9 c\u1ea7n \u0111\u1ec3 \u00fd v\u00e0 quan s\u00e1t k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 m\u1ed9t ch\u00fat l\u00e0 c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c con l\u00f4 r\u01a1i t\u1eeb gi\u1ea3i \u0111\u1eb7c bi\u1ec7t.<\/p>\n
Th\u01b0\u1eddng c\u00f3 2 lo\u1ea1i l\u00f4 r\u01a1i l\u00e0 r\u01a1i t\u1eeb \u0111\u1ec1 v\u00e0 r\u01a1i t\u1eeb l\u00f4. B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u1ee5 th\u1ec3 ch\u00fang t\u1ea1i b\u00e0i vi\u1ebft: C\u00e1ch b\u1eaft l\u00f4 r\u01a1i<\/em><\/p>\n C\u00e1ch t\u00ednh l\u00f4 theo gi\u1ea3i \u0111\u1eb7c bi\u1ec7t m\u00e0 c\u1ed9ng t\u1ed5ng c\u1ee7a 5 s\u1ed1 l\u1ea1i v\u1edbi nhau \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 r\u1ea5t l\u1edbn. Theo nh\u01b0 c\u00e1c chuy\u00ean gia l\u00f4 c\u1ee7a ch\u00fang t\u00f4i t\u1ed5ng h\u1ee3p. C\u00e1ch \u0111\u00e1nh n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u c\u00e1c anh em ch\u01a1i l\u00e2u n\u0103m \u00e1p d\u1ee5ng. V\u00e0 \u0111em l\u1ea1i t\u1ec9 l\u1ec7 tr\u00fang v\u00f4 c\u00f9ng cao.<\/p>\n \u01afu \u0111i\u1ec3m c\u1ee7a c\u00e1ch n\u00e0y l\u00e0 kh\u1ea3 n\u0103ng v\u1ec1 r\u1ea5t cao. C\u00e1ch t\u00ednh n\u00e0y c\u00f2n c\u1ef1c k\u1ef3 \u0111\u01a1n gi\u1ea3n. V\u00e0 th\u00edch h\u1ee3p cho nh\u1eefng anh em m\u1edbi ch\u01a1i ch\u01b0a c\u00f3 nhi\u1ec1u kinh nghi\u1ec7m v\u00e0 v\u1ed1n c\u00f2n kh\u00e1 \u00edt. V\u1edbi c\u00e1ch n\u00e0y anh em v\u1eeba c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c th\u1eddi gian m\u00e0 v\u1eeba c\u00f3 th\u1ec3 \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 cao. C\u00e1ch t\u00ednh r\u1ea5t d\u1ec5 anh em ch\u1ec9 c\u1ea7n c\u1ed9ng t\u1ed5ng 5 s\u1ed1 \u1edf gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u1ea1i v\u1edbi nhau. Sau \u0111\u00f3 l\u1ea5y s\u1ed1 t\u1ed5ng m\u00e0 ch\u00fang ta c\u1ed9ng \u0111\u01b0\u1ee3c t\u1eeb gi\u1ea3i \u0111\u1eb7c sang \u0111\u00e1nh l\u00f4.<\/p>\n V\u00ed d\u1ee5:<\/p>\n Gi\u1ea3i \u0111\u1eb7c bi\u1ec7t ng\u00e0y h\u00f4m nay v\u1ec1 l\u00e0: 23119<\/p>\n Anh em l\u1ea5y 2 + 3 + 1 + 1 + 9 = 16. L\u00fac n\u00e0y anh em l\u1ea5y s\u1ed1 16 v\u00e0 61 n\u00e0y \u0111i \u0111\u00e1nh l\u00f4.<\/p>\n Tuy nhi\u00ean v\u1edbi c\u00e1ch n\u00e0y ch\u00fang t\u00f4i khuy\u00ean c\u00e1c b\u1ea1n r\u1eb1ng ch\u1ec9 nu\u00f4i trong 7 ng\u00e0y. Qu\u00e1 th\u1eddi gian th\u00ec anh em n\u00ean \u0111\u1ed5i sang t\u1ed5ng kh\u00e1c. Th\u01b0\u1eddng th\u01b0\u1eddng th\u00ec 2 \u2013 5 ng\u00e0y th\u00ec anh em h\u00e3y \u0111\u1ed5i s\u1ed1.<\/p>\n \u0110\u1ec3 c\u00f3 th\u1ec3 soi c\u1ea7u l\u00f4 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. Th\u00ec ghi l\u00f4 theo t\u1ed5ng \u0111\u1ec1 c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh x\u00e1c nh\u1ea5t hi\u1ec7n nay. V\u1edbi c\u00e1ch ghi l\u00f4 n\u00e0y, anh em c\u1ea7n d\u1ef1a theo b\u1ea3ng t\u1ed5ng h\u1ee3p k\u1ebft qu\u1ea3 ch\u01a1i \u0111\u1ec1 \u0111\u00e3 c\u00f3 tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n Sau \u0111\u00f3, t\u1ea1i gi\u1ea3i \u0111\u1eb7c bi\u1ec7t, ta s\u1ebd c\u00f3 gi\u1ea3i ph\u00e1p t\u00ednh t\u1ed5ng \u0111\u1ec1 \u0111\u1ec3 \u0111\u01b0a ra nh\u1eefng con s\u1ed1 t\u1ed5ng. \u0110\u00e2y s\u1ebd s\u1ed1 l\u00f4 c\u00f3 x\u00e1c su\u1ea5t tr\u00fang cao nh\u1ea5t trong ng\u00e0y 1 \u2013 2 ng\u00e0y t\u1edbi. C\u00e1ch ch\u01a1i n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 v\u00f4 c\u00f9ng \u0111\u01a1n gi\u1ea3n nh\u01b0ng l\u1ea1i \u0111em l\u1ea1i x\u00e1c su\u1ea5t tr\u00fang t\u01b0\u01a1ng \u0111\u1ed1i cao. B\u1edfi ch\u1ec9 c\u1ea7n d\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 c\u1ee7a s\u1ed1 \u0111\u1ec1 \u0111\u00e3 ra. \u00c1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p t\u00ednh t\u1ed5ng \u0111\u1ec1 l\u00e0 anh em \u0111\u00e3 c\u00f3 th\u1ec3 s\u1edf h\u1eefu ngay cho m\u00ecnh con l\u00f4 \u0111\u1eb9p<\/p>\n V\u00ed d\u1ee5: Gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111\u1ec1 h\u00f4m nay v\u1ec1 10221. Anh em c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p t\u00ednh t\u1ed5ng \u0111\u1ec1 h\u00ecn qu\u1ea3 tr\u00e1m nh\u01b0 sau<\/p>\nC\u00e1ch t\u00ednh l\u00f4 theo gi\u1ea3i \u0111\u1eb7c bi\u1ec7t b\u1eb1ng t\u1ed5ng<\/strong><\/span><\/h2>\n
\u0110\u00e1nh l\u00f4 theo t\u1ed5ng c\u1ee7a 5 s\u1ed1 \u1edf gi\u1ea3i \u0111\u1eb7c bi\u1ec7t<\/strong><\/span><\/h3>\n
Ghi l\u00f4 theo t\u1ed5ng \u0111\u1ec1<\/strong><\/span><\/h3>\n