1.2 乘与除的互逆关系
+329=576 ÷13="37"
﹣235=235 ×37="2331"
÷569=0 9286﹣ =808
29× =609 1288÷ =23
763﹣ =0.
(1) +16.9=131.6
(2) ×23=828
(3) ÷65=26
(4)513.02﹣ =96.7
(5)563.5﹣ +39.2=156.9
(6)125.3﹣(18.25+ )=63.





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