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Khan Academy
Course: Precalculus > Unit 7. Lesson 10: Multiplying matrices by matrices. Intro to matrix multiplication.
How could we calculate 7^256 mod 13 using a calculator that can't hold numbers larger than 7^10?
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Ready to sharpen your multiplication skills? With this unit, you'll practice multiplying 1 and 2 digit numbers. Once you've got the hang of it, you'll be multiplying your way through any problem thrown your way.
Khan Academy gives instant feedback after every answer – including hints and video support if students are stuck. Math worksheets take up time to collect and take up valuable planning time to grade. Khan Academy questions are graded instantly and automatically for you.
Help Needed on Multiplying Mixed Numbers. So, the question was basically 1 1/5 of 1 1/2. I understand ONE way how to draw it with pizza slices: one whole slice (5/5) + 1/5 of a pizza & one whole slice (2/2) plus 1/2 of a pizza, which is 6/5 and 3/2 respectively, then leads you to get 1 4/5 or 9/5.