Ms. Jacoby's Second Grade
September Math Facts Goal:
Learn all "10" Addition/Subtraction Facts
and Tens Trick

1+9=10 9+1=10 10-1=9 10-9=1	2+8=10 8+2=10 10-2=8 10-8=2
3+7=10 7+3=10 10-3=7 10-7=3	4+6=10 6+4=10 10-4=6 10-6=4
5+5=10 10-5=5	Have fun practicing your math facts online at Math Counts.
Remember: Learn="Instant" Answer

Tens Trick The Tens Trick is easy. Whenever the numbers 0-9 are added to ten that number just slides into the ones place.
10+0=10	10+1=11
10+2=12	10+3=13
10+4=14	10+5=15
10+6=16	10+7=17
10+8=18	10+9=19
Challenge: What is 10+10? Does the Tens Trick work for 20? Should we call it the "Twenties Trick"? What about 30, 40, 50, 60, 70, 80, 90?