1. Обчисли зручним способом:
1) 402 +7982 + 1598;
2) (2414+ 197) + 47 586;
3) 27 311 + 78 + 819;
4) 33+34+35+36+37.
1) 402 +7982 + 1598;
2) (2414+ 197) + 47 586;
3) 27 311 + 78 + 819;
4) 33+34+35+36+37.
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Answers & Comments
Ответ:
1
1) 7982+1598=9580
2) 9580+402=9982
2
1) 2414+47586=50000
2) 50000+197=50197
3
1) 27311+819=28130
2) 28130+78=28208
4
(33+37)+(34+36)+35=175
2)(2414+47586)+197=50197
3)(27311+819)+78=28208
4)(33+37)+(34+36)+35=175