Обчисліть найзручнішим способом:
1) (189+5472)-472;
2) (9176+537)-176;
3) (4863 +8125)- 2463.
1) (189+5472)-472;
2) (9176+537)-176;
3) (4863 +8125)- 2463.
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Ответ:
1) (178+5472)-472=(5472-472)+178=5178
2) (9176+537)-176=(9176-176)+537=9537
3) (4863+8125)-2463=(4863-2463)+8125=10 325