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口算大闯关,第一关,77=,89=,8+3=,6+7=,76=,56-8=,59=,81+5=,45=,12+8=,48=,72-8=,81+9=,38+9=,25+5=,24+8=,45-5=,44+25=,41-8=,36+4=,58-13=,50-16=,45+15=,54-38=,54+19=,24+19=,20-53=,35-7=,36-9=,45+39=,34+44=,10-23=,78=,16+43=,98=,93+9=,66=,58=,45-8=,20-100=,100-18=,12+42=,91-18=,90-89=,60-85=,98-98=,12-18=,57+5=,46+54=,
