<\/span><\/h3>\nTheo c\u00e1c k\u1ebft h\u1ee3p kh\u00e1c nhau, c\u00e1c t\u00f4ng s\u00f3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh n\u0103m lo\u1ea1i sau:<\/span><\/p>\n\n- 1. C\u00e1c t\u00f4ng bao g\u1ed3m m\u1ed9t l\u1edbp gi\u1ea5y l\u00f5i v\u00e0 th\u1ebb kraft \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 “c\u00e1c t\u00f4ng s\u00f3ng”. C\u00e1c t\u00f4ng s\u00f3ng th\u01b0\u1eddng ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m \u0111\u1ec7m, mi\u1ebfng \u0111\u1ec7m v\u00e0 g\u00f3i c\u00e1c \u0111\u1ed3 v\u1eadt c\u00f3 h\u00ecnh d\u1ea1ng b\u1ea5t th\u01b0\u1eddng.<\/span><\/li>\n
- 2. C\u00e1c t\u00f4ng bao g\u1ed3m m\u1ed9t l\u1edbp gi\u1ea5y l\u00f5i v\u00e0 hai l\u1edbp th\u1ebb kraft tr\u00ean v\u00e0 d\u01b0\u1edbi \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 “b\u00eca c\u1ee9ng m\u1ed9t l\u1ed7”.<\/span><\/li>\n
- 3. Gi\u1ea5y l\u00f5i hai l\u1edbp \u0111\u01b0\u1ee3c k\u1eb9p trong th\u1ebb kraft ba l\u1edbp \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 “b\u00eca c\u1ee9ng \u0111\u00f4i”. C\u00e1c t\u00f4ng h\u1ed1 k\u00e9p c\u00f3 th\u1ec3 bao g\u1ed3m gi\u1ea5y h\u1ed1 v\u1edbi chi\u1ec1u r\u1ed9ng h\u1ed1 kh\u00e1c nhau v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng gi\u1ea5y kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 gi\u1ea5y h\u1ed1 “B” v\u00e0 gi\u1ea5y h\u1ed1 “C”.<\/span><\/li>\n
- 4. Gi\u1ea5y l\u00f5i ba l\u1edbp \u0111\u01b0\u1ee3c k\u1eb9p trong th\u1ebb kraft b\u1ed1n l\u1edbp \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 “b\u00eca c\u1ee9ng ba l\u1ed7”.<\/span><\/li>\n
- 5. C\u00e1c t\u00f4ng hai th\u00e2n c\u1ef1c k\u1ef3 ch\u1eafc ch\u1eafn \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n t\u1eeb c\u00e1c t\u00f4ng m\u1ed9t l\u1ed7, v\u00e0 l\u1edbp gi\u1ea5y l\u00f5i \u1edf gi\u1eefa \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng hai lo\u1ea1i gi\u1ea5y l\u00f5i d\u00e0y x\u1ebfp ch\u1ed3ng l\u00ean nhau v\u00e0 li\u00ean k\u1ebft v\u1edbi nhau.<\/span><\/li>\n<\/ul>\n