rozwiąż podane przykłady sposobem ułamków dziesiętnych:
5/8 * 4,2 - (1/4)^2=
4/7 * (0,2 + 1/4)=
* 5/8*42/10-1/2*1=1/4*21/2-1/2=21/8-4/8=17/8 (:
* 4/7*(2/10+1/4)=4/7*(1/5+1/4)=4/7*(4/20+5/20)=4/7*9/20=1/7*9/5=9/35 :)
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* 5/8*42/10-1/2*1=1/4*21/2-1/2=21/8-4/8=17/8 (:
* 4/7*(2/10+1/4)=4/7*(1/5+1/4)=4/7*(4/20+5/20)=4/7*9/20=1/7*9/5=9/35 :)