(60-124)15(328+1989)70四则运算练习题350-(2476)2(480+204)201721-36(432-408)420-(2515)48(281815)(230-2155)1670+(750-6511)(80020+36)12(30015-11)12480-(80+20)4(160+88020)4(90-212)12(73+22)(72-67)365(27-17)(457+2814)5280(240-825)30+(96-125)50-[(165+35)100]32(20-9624)(58+37)(64-95)19+(253-22)21(23+23)24-597304-275(27525)(70+10)(18-10)85+14(14+20826)21+(327-23)19539-513(37814)(110-10)10-10(53-58821)36(60+10)(17-10)17+(233-43)1022+(374-10)26(245-11)18-1122-(10+10010)(252-14)17-10(346-10)16-12215-198(12111)(45-65121)33(714-12)27-1914+(21-19)1444+1516-32(10-10010)11736(43-20)23(227+11)(31-14)(31-15411)12(1369-37)37-32160(22-12)22(438-39)21-12(20+18)11-239(58+370)(64-45)(247+18)272536-720(36018)(702037)28(540-360)(185)(58+37)(64-95)95(64-45)360(602)(36012-10)20(2436)1214(86-24)531(365-328)(73-55)765(491-476