Toán Lớp 6: tìm bcnn(7;5;12) nhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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Toán Lớp 6: tìm bcnn(7;5;12) nhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Comments ( 2 )
tìm bcnn(7;5;12)
7=7
5=5
12=$2^{2}$ . 3
bcnn(7;5;12) = 7.5.$2^{2}$ . 3=7.5.4.3= 420
Lời giải và giải thích chi tiết:
Ta có :
7=7
5=5
12=2^2 . 3
⇒ BCNNN(7;5;12)= 2^2 . 3 . 5.7 =420