Strategy Description Examples Zero If I have 0 groups of anything, I always have 0. Think:  The answer is always 0! 0*5 Think: It’s always 0. Ones (or the Identity) If I have 1 group of any number, I just have that number. Think:  1 times any number is that number. 1*6 Think:  It is just the number, so it is 6! Twos Double the number. OR This is Doubles from addition! 2*8 Think:  Double 8, so 8+8 is 16. Threes Double plus another. 3*6 Think:  Double 6 is 12, add 6 again, that’s 18. Fours Double and double again.   OR Double and then add the double to itself 4*7 Think:  Double 7 is 14 and double 14 is 28. OR Double 7 is 14, so 14 and 14 is 28. Fives Count by fives.   OR Multiply by 10 and halve that. 5*6 Think:  5, 10, 15, 20, 25, 30  That’s six 5s so the answer is 30. OR 10 *6 is 60, half of 60 is 30. Sixes Triple the number and then double it. OR Multiply by five and add another. 6*7 Think:  3*7 is 21, double 21 and get 42. OR  5*7 is 35, add another 7 and get 42. Sevens Multiply by five and add the double. 7*8 Think:  5*8 is 40, 2*8 is 16, 40+16 is 56. Eights Double the number three times. 8*6 Think:  2*6 is 12, 2*12 is 24, and 2*24 is 48. Nines Multiply by 10 and subtract the number. OR Think one less than the number, put the new number in the tens place.  The ones column is the number that added to the new tens place equals nine. 9*7 Think:  10*7 is 70, subtract 7 to get 63. OR One less than 7 is 6, so 60. 6+3 is 9 so 60+3 makes 63. Tens Add a zero to the number. 10*6 Think:  Put 6 in the tens place and 0 in the ones place to get 60.