№ 1.
4*17*25 = (4*25)*17 = 100*17 = 1700
№ 2.
497*38 - 496*38 = 38*(497 - 496) = 38*1 = 38
№ 3.
23*48 - 35*23 + 77*13 = 23*(48 - 35) + 77*13 = 23*13 + 77*13 = 13*(23 +77) =
13*100=1300
Ответы: 1700, 38, 1300.
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Answers & Comments
№ 1.
4*17*25 = (4*25)*17 = 100*17 = 1700
№ 2.
497*38 - 496*38 = 38*(497 - 496) = 38*1 = 38
№ 3.
23*48 - 35*23 + 77*13 = 23*(48 - 35) + 77*13 = 23*13 + 77*13 = 13*(23 +77) =
13*100=1300
Ответы: 1700, 38, 1300.