Math Skills description

include:
trick addition rule,
trick subtraction rule,
trick multiplication rule,
trick division rule,
trick multiply by 11 2digit rule,
trick square numbers editing in 5 rule,
trick multiply by 5 rule,
trick multiply by 9 rule,
trick multiply by 4 rule,
trick dividing by 5 rule,
trick subtracting from 1000 rule,
trick tough multiplication rule,
trick power of two rule,
trick adding numbers close to hundreds rule,
trick subtracting numbers close to hundreds rule,
trick multiply numbers between 11 and 19 rule,
trick square number between 11 and 99 rule,
trick multiply two digit numbers having same tens rule,
trick square number between 50 and 59 rule,
trick square number between 40 and 49 rule,
trick multiply two digit numbers editing in 1 rule,
trick percent rule,
trick square number between 100 and 109 rule,
trick square root rule,
trick percent 2 rule,
trick multiply by 15 rule,
trick multiply by 20 rule,
trick dividing by 4 rule,
trick dividing by 20 rule,
trick dividing by 50 rule,
trick dividing by 25 rule,
trick square number between 10 and 19 rule,
trick multiply by 99 rule,
trick multiply by 25 rule,
trick multiply by 50 rule,
trick dividing by 40 rule,
trick multiply by 05 rule,
trick dividing by 05 rule,
trick square numbers editing in 25 rule,
trick multiply by 02 rule,
trick dividing by 02 rule,
trick multiply by 025 rule,
trick dividing by 025 rule,
trick square number between 20 and 29 rule,
trick square number between 30 and 39 rule,
trick square number between 60 and 69 rule,
trick square number between 70 and 79 rule,
trick square number between 80 and 89 rule,
trick 50 percent rule,
trick 25 percent rule,
trick 20 percent rule,
trick 15 percent rule,
trick 5 percent rule,
trick 4 percent rule,
trick 2 percent rule,
trick 05 percent rule,
trick 150 percent rule,
trick 200 percent rule,
trick multiply by 3 rule,
trick multiply by 6 rule,
trick multiply by 7 rule,
trick multiply by 8 rule,
trick multiply by 12 rule,
trick multiply by 13 rule,
trick multiply by 14 rule,
trick multiply by 16 rule,
trick multiply by 17 rule,
trick multiply by 18 rule,
trick multiply by 19 rule,
trick 250 percent rule,
trick dividing by 15 rule,
trick dividing by 6 rule,
trick 3 root rule,
trick 4 root rule,
trick 6 root rule,
trick 9 root rule,
trick power 2 rule,
trick power 2 between 100 and 999 rule,
trick power 2 between 1000 and 9999 rule,
trick power 3 rule,
trick power 3 between 100 and 999 rule,
trick power 4 rule,
trick power 6 rule,
trick power 9 rule,
trick dividing by 3 rule,
trick dividing by 2 rule,
trick multiply by 2 rule,
trick dividing by 8 rule,
trick 5 root rule,
trick multiply by 125 rule,
trick square numbers editing in 75 rule,
trick square numbers editing in 125 rule,
trick multiply by 250 rule,
trick multiply by 500 rule,
trick multiply by 750 rule,
trick multiply by 999 rule,
trick dividing by 7 rule,
trick dividing by 9 rule,
trick 300 percent rule,
trick 500 percent rule,
trick multiply by 75 rule,
trick square numbers editing in 05 rule,
trick square numbers editing in 15 rule,
trick square numbers editing in 95 rule.