北师大版二年级下册第一单元除法绿色圃中小学教育网÷4=3(个)······1(根)…余数绿色圃中小学教育网÷=3(个)······42(根)15÷=3(个)······43(根)16÷=4(个)······40(根)17÷=4(个)······41(根)18÷=4(个)······42(根)19÷=4(个)······43(根)20÷=5(个)······40(根),算一算。,算一算。2764个3个43绿色圃中小学教育网小学教育网÷4=7(个)······5(根)8(个)1(根)33÷4=······81(根)(根)(个)
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