三年级数学日记集.doc

?1+1? ?681+731?798+856?596-36?-?1+1?1+1?!?1+1=2?1+1=1?111?1+1?1?90?+?1+1?33?2?1+1? t121?99939339 -10251010251155101235?2:304?- -12:0013:3015:0016:3013:30-12:00=1301630-15:00=1303130+130=3130+130=3-130130- ,851036?816 34-12 43=12- ?86?-48=3226=1232+12=44?44?-2 28=16() 46=2416+24=40? -52001000-200200-1=19919952001995=995 -4?-2-35? 200302530200+30+25+30=285285300?300-285=25()?!?25?300-285=15-9,9-8=15 ?1.521.21.53=4.5()1.23=3.6()4.5-3.6=0.9() 4.54.534.53=13.5() 68!8-6=2()10?!?10-?-4.9(10-1)2=4.5 3.6+13.5+8+4.5=29.6()29.6+(4.9-4.5)=29.6+0.4=30()30 472 47-2=45?10145?10140450.54+0.5=4.5?4.5?4.5?