I gimnazjum

Matematyka 2001

a) 4,5⋅(2+2,6)=4,5⋅4,6=20,7 <img src="https://prod.odrabiamy-assets.pl/uploads/content_image/image/34592/UIRpOcIKAao1jASnN0nDag%3D%3D_6d233eebacec290f72d0236a7a641e3fb205704c2c25ee70211a31c6f0d56151.png"> b) &nbsp; (8,5−5,4):0,8=3,1:0,8=31:8=831​=387​=3,625

a) 0,(3)+0,(5)=0,333…+0,555…=0,888..=0,(8) b) 0,(12)+0,(45)=0,121212…+0,454545…=0,575757…=0,(57) c) 0,(127)+0,(13)=0,127127127127…+0,131313131313=0,258440258440…=0,(258440)

8,1:0,18+2,1−1,75=810:18+2,1−1,1−0,65=45+1−0,65=

a) 3,2⋅(121​+7,6)=3,2⋅(1,5+7,6)=3,2⋅9,1=29,12 <img src="https://prod.odrabiamy-assets.pl/uploads/content_image/image/34609/IYTlLGgt2UCoXhDKLmuA0Q%3D%3D_9ed60537eafe21c09e9e7e69fe3964168c9dedff539253015b990eedfdc9ecf2.png"> b) (3,18−243​)⋅0,7=(3,18−2,75)⋅0,7=0,43⋅0,7=0,301

Ile zapłacono za lody: 2,70zł+1,50zł+3,99zł=8,19zł

3000zł:2,45zł=300000:245=1224,489796≈1224,49

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