Butterfly house

Problem-solving Modelling numbers Show base 10 place-value pieces: flats (100), longs (10) and units (1). Include blocks (1000) if students{...}

WARM UP Explain the difference between dependent and independent events.   Draw table on the board (Independent/dependent) and use counters/marbles,{...}

  http://nrich.maths.org/2004 Trebling Age 7 to 11 Challenge Level Can you replace the letters with numbers? Is there only one{...}