四年级数学题用简便方法计算(用递等式)(138+73)+22756+258+14482+167+118+23372+145+28283+36+64+17412+3450+158825x37x477x50x68x25x125185x5x20125x16x825x16x2x2(25+17)x424x31+76x31(125+18)x883+8
四年级数学题用简便方法计算(用递等式)
(138+73)+22756+258+14482+167+118+23372+145+28283+36+64+17
412+3450+158825x37x477x50x68x25x125185x5x20125x16x8
25x16x2x2(25+17)x424x31+76x31(125+18)x883+83x99
19x202125x32-125x24