江苏省淮安市淮阴区凌桥乡七年级数学上册 2.5 有理数的加法与减法练习（2）练习（新版）苏科版.doc

有理数加减练习（2）(43) 14-12-(-20)+(-13) (44) 17-9-20+(-10)(45) 12/(-14)+(-14)+ (-2) (46) (-15)-12-(-17)-(-3)(47) 6-3-9+(-8) (48) (-20)-(-15)+10(49) 7/(-2)+(-3)-(-14) (50) 13-2+18-(-7)(51) 13-5+6+3 (52) (-15)-5+3+(-20)(53) 19-4+17-4 (54) (-11)-(-6)+(-4)-(-9)(55) (-16)+16-(-8)+(-13) (56) 16-(-1)+(-10)-(-20)(57) (-1)-(-9)-9+(-19) (58) 13-20-(-13)+4(59) 11+(-6)-3+18 (60) (-20)+(-12)+(-1)(61) (-19)-3+(-13)-4 (62) (-13)-3-5+8(63) (-15)-1+17+(-18) (64) (-13)-3+19-8(65) (-3)-(-13)-20+5 (66) 3-12+(-18)-18(67) 5-(-19)+13+(-6) (68) 4+4-(-19)-11(69) (-2)+17-5+(-1) (70) 9+(-3)-19+(-19)