Көбейтудің үлестірімдік қасиеті. Жақшаны ашу.
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3⋅(4+5)
3⋅4+3⋅5=12+15=27
7⋅(10−3)
7⋅10−7⋅3=70−21=49
5⋅(2+x)
5⋅2+5⋅x=10+5x
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