Addition+Strategies

Efficient addition strategies to work on: (let’s make a poster for this, and a sheet for math folders, and practice them regularly in homework and class)

Pulling out tens and ones / breaking numbers apart 27+12=? 27 = 20+7 12=10+2 20+10=30 7+2=9 30+9=39 Looking for friendly numbers • Doubles • Plus-tens • Make-tens • Plus-ones • Plus-twos • Near-doubles Jumping on the number line Adding ten Getting to a landmark number Landmark numbers 27+6= 6=3+3 27+3=30 30+3=33

Precursors to these strategies:
 * Adding ten (13+10=23; 23+10=33; 33+10=43, etc.)
 * Ten-plus (10+2=12; 10+3=13; 10+4=14, etc.)
 * Basic facts