000 00280nam a2200109 a 4500
001 4140
005 20140414131955.0
008 090218s19uu xx 00 eng d
050 _aTR 512.92
_bSu1 2003
245 _aSubtraction facts :
_b2 digit numbers. Grades 2-3.
999 _c112914
_d112914