Riley está leyendo un libro que tiene veinte páginas. Riley lee doce páginas antes del almuerzo. Riley lee cinco páginas después del almuerzo. Riley dice que leyó diecisiete páginas en su libro. ¿Tiene razón Riley? Demuestra todo tu razonamiento matemático.
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I used your stuff in the 90's and loved it ... you were so Common Core before the Core.
B. Herod
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