整十數(shù)加、減整十數(shù),我會算,3+22+76-37-45+19-83+38+2,5,3,6,6,9,3,1,10,,我會做,80里面有個十50里面有5個里面有7個十10個十是)。,8,十,70,100,4030,大客車,小客車,4030,,,40+30=,,70,十個十個地數(shù),,40,,50,,60,70。,,,,4個十,,加,得,,7個十,40+30=,3個...
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