01046nam a2200265 i 4500991003587859707536080429s2007 it j ita d9788847005839b13720247-39ule_instDip.to Matematicaeng510.7AMS 00A35Zan, Rosetta503210Difficoltá in matematica :osservare, interpretare, intervenire /Rosetta ZanMilano :Springer-Verlag Italia,2007xv, 306 p. ;24 cmConvergenzeMathematics Education.b1372024702-04-1429-04-08991003587859707536LE013 00A ZAN11 (2007)12013000207735le013pE22.95-l- 000110.i1473897129-04-08LE022 510 ZAN01.0112022000135153le022LE022/PINNELLI/2011pE22.95-l- 051350.i1535181628-11-11Difficoltà in matematica713494UNISALENTOle013le02229-04-08ma -itait 00