Harry’s Reviews > Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks > Status Update
Harry
is on page 107 of 279
I learned how to do fast mental multiplication of 2 digit numbers with 2 digit numbers using different methods and squaring. Then there was a easy basic introduction to fraction addition and subtraction
— 16 hours, 21 min ago
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Harry’s Previous Updates
Harry
is on page 62 of 279
Multiplication two digit numbers with two digit numbers.
— Jul 08, 2026 12:48PM
Harry
is on page 43 of 279
I learned fast (mental) multiplication of one digit number versus two or three digit number
— Jul 07, 2026 01:47PM
Harry
is on page 28 of 279
Learned fast mental multiplication by 11 of 2 and 3 digit numbers. Fast mental additiotion and subtraction of 2, 3, 4 digit numbers
— Jul 06, 2026 01:17PM
