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Reading Fun,Sub topics go here,绿色圃中小学教育网,9,的加,减,法,口算,1+7=8-1=7+1=8-7=,8-6=2+6=8-2=6+2=,3+5=8-3=5+3=8-5=,4+4=8-4=,8,7,8,1,2,8,6,8,8,5,8,3,8,4,试一试,把,9,个 分成两堆,说出,4,道算式,(),+,(),=,(),-,(),=,(),+,(),=,(),-,(),=,+,=,9,1,8,4,0,3,7,6,5,9,2,9-,8,4,2,6,5,7,3,9,0,1,比一比,赛一赛,1+8=9-2=8+1=3+6=,2+7=6+3=9-4=9-7=,9-6=4+5=9-8=9-5=,动动脑,你能填出几道算式,+,=,9,-,=,9,
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