17×12+43×12 решить удобным
dasha1975
2
08.09.2020 14:13
0
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1
720
Пошаговое объяснение:
(17+43)×12=60×12=720
a×c+b×c=(a+b)×c
a×c-b×c=(a-b)×c, если а>b, или а=b
(17+43)×24=1440
Пошаговое объяснение:
1). 17+43=60
2). 60×24=1440