736÷67= 801÷89= 321÷45=
①37×64=
②0.9+5.4=
③469÷8=
④11.2-5.7=
⑤860÷4=
⑥83×45=
998-600= 212+177= 398+600=
998-398= 388-212= 390+212=
问:这两条绳子原来的长度是多少厘米?