Calculati a) 37 x [5/14 + (1-2/7) la 2 : 10/21]
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Răspuns:

Explicație pas cu pas:

37 × [ 5/14 + ( 1 - 2/7 )² : 10 / 21 ] =

= 37 × [ 5/14 + ( 7/7 - 2/7)² : 10 / 21 ]=

= 37 × ( 5/14 + 5²/7² : 10/21) =

= 37 × ( 5/14 + 25 /49 × 21 / 10 ) =

= 37 × ( 5/14 + 15 / 14 ) =

= 37 × 20 / 14 =

= 370 / 7=

= 52 intregi si 6/7

37*[5/14+(7/7-2/7)^2]*21/10=

37*[5/14+5^2/7^2]*21/10=

37*[5/14+25/49]*21/10=

37*[35/98+50/98]*21/10=

37*85/98*21/10=

37*85*21/980=  (  simplific cu 5)

37*17*21/198=   (simplific cu3)

37*17*7/66