Maths and Science

-Fractions is the way to show how a whole is divided into equal parts. -Fractions is the symbol which represents one or more one parts of whole which has been divided into equal parts. 2/3    2 is numerator; 3 denominator; / fraction bar Fractional unit -is the fraciton which represents a single element of the parts into which the whole has been divided (into equal parts). e.g. the fracitonal unit of 3/5 is 1/5. -A fraction can also represents a number (limitated or unlimitated decimal) in which the fraction bar is the dividing line between the numerator and numerator

Algebra p 79 da n 750 a 752; p 91 n 995-996;p151 da n 215 a 217;p152 da n 222 a 224;p155 n272-273-274;p156 n311-312; p160 n 369-370 Geometriap 35 n 156; p 33 n 136-137-138; p 25 n 43-44 RIPASSARE BENISSIMO le formule a pag11-12-14-15-17-211-212-213 (esclusi i volumi)

L'area del cerchio è di 960p cm quadrati. Calcola la lunghezza della circonferenza. Calcola la lunghezza della circonferenza che delimita un cerchio di area 907,46 dm quadrati. Calcola l'area del cerchio la cui circonferenza è 24pcm.