840除以7等于120.35乘以3等于105
840除以7等于120.35乘以3等于105 735加105等于840合并综合算式_百度...
735+105=840 735+35×3=840 840÷7=120 ( 735+35×3 )÷7 =(735+105)÷7 =840÷7 =120 望采纳🌦🤠——🐦,
735+105=840 735+35×3=840 840÷7=120 ( 735+35×3 )÷7 =(735+105)÷7 =840÷7 =120 望采纳🌦🤠——🐦,