6 szkoły podstawowej

Matematyka 2001

29,76 - 0,81 ∙ 29,76 = 29,76 - 24,1056 = 29,7600 - 24,1056 = 5,6544

Rozwiązanie 1

a)  4⋅3,7−2,5⋅5=4⋅3+4⋅0,7−(2⋅5+0,5⋅5)=12+2,8−(10+2,5)=14,8−12,5=2,3

a)  <img style="vertical-align: middle;" src="../../../math/formula?%5Cdisplaystyle%7B%5Cleft(%7B88%7D%2C%7B09%7D%2B%7B44%7D%2C%7B78%7D%5Cright)%7D%5Ccdot%7B%5Cleft(%7B88%7D%2C%7B09%7D-%7B44%7D%2C%7B78%7D%5Cright)%7D%3D%7B132%7D%2C%7B87%7D%5Ccdot%7B43%7D%2C%7B31%7D%3D%7B5754%7D%2C%7B5997%7D"> <img src="https://prod.odrabiamy-assets.pl/uploads/content_image/image/25003/xngBIdOzLSbUIwvGIxi02g%3D%3D_975657c5b8b03c702a5c8690f7dcec72b99230bf63b403b128b18aa870d845a1.jpg" width="432" height="418">

a)  Bakterie :  12⋅10t=120t   Dżdżownice :  12⋅4t=48t   Pierwotniaki :  12⋅0,37t=10⋅0,37t+2⋅0,37t=3,7t+0,74t=4,44t

3,40⋅7,20zl+1,25⋅4,20zl=3,4⋅7,2zl+1,25⋅4,2zl=

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