Distributive property when multiplying (video) | Khan Academy
https://www.khanacademy.org/math/cc-third-grade-math/3rd-basic-multiplication/distributive-property/v/using-the-distributive-property-when-multiplying
Also look for patterns. For example, the 9's have an easy pattern. For 9x1 all the way through 9x10, the tens digit is one less than the number being multiplied by 9, and the units and tens digits add to 9. So for 9x6, the tens digit is 6-1=5, and the units digit is 4 because 5+4 = 9. So 9x6 = 54. This is not the only strategy and pattern.
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