III gimnazjum

Matematyka wokół nas 3

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2,5kg+10kg=12,5kg

10+142+4​⋅100%=246​⋅100%=25%

0,25⋅500=125 500125​⋅100%=25%

30%⋅90=0,3⋅90=27

13,5dag=135g

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