Câu hỏi: Tính a) 37⋅−19+37⋅−23; b) −713⋅512+−713⋅712+−613; c) −23+37:59+47−13:59; d) 59:111−522+59:115−23; e) 35+311−−37+−297−135−34+−2344. Trả lời: a) 37⋅−19+37⋅−23=37⋅−19+−23=37⋅−19+−69=37⋅−79=−13 b) −713⋅512+−713⋅712+−613=−713⋅512+712+−613=−713⋅1212+−613=−713+−613=−1313=−1 c) −23+37:59+47−13:59=−23+37⋅95+47−13⋅95=95⋅−23+37+47−13=95⋅−23−13+37+47 d) 59:111−522+59:115−23=59:222−522+59:115−1015=59:−322+59:−915=59⋅−223+59⋅−159=59⋅−223+−53=59⋅(−9)=−5 e) 35+311−−37+−297−135−34+−2344=35−−37−135+311−34+−2344+−297=2135−−1535−135+1244−3344+−2344+−297=1+(−1)+−297=−297 ====== **** mời các bạn xem câu tiếp bên dưới **** =====
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