一、直接写出得数 26+53=79 35+44=79 41+38=79 52+27=79 87-42=45 96-53=43 78-25=53 89-61=28 25+42-31=36 33+26-19=40 48+21-33=36 86-50+22=58 90-36+15=69 75-28+16=63 二、在括号中填入合适的数 (44)+24=68 88-(25)=63 29+(36)=65 79-(44)=35 42+(34)=76 84-(37)=47 36+(51)=87 71-(43)=28 (46)+45=91 93-(51)=42 (49)+33=82 76-(37)=39 (44)+51=95 95-(39)=56 53+(35)=88
