或
口诀:
6+25=
25-7=
73-38=
50+20=
31-12=
35+8=
50-5=
67+10=
40+24=
93-42=
30+40=
85-25=
25+43+19=
80﹣19﹣32=
50﹣32+29=
4×4= 34+6= 0+7= 5×5-7=
52-9= 7×8= 4×3= 4×2+7=
5×9= 4×6= 5×2= 3×6-8=
②(朵)
□×□=□ □÷□=□
问:这两条绳子原来的长度是多少厘米?