19 is only 1 away from 20, so you prefer to start by multiplying 20 times 5, which equals 100. Then we need to take away a squadron of 5, because there are actually only 19 squadrons, not 20. 100 take ...
Multiplication of two-digit numbers and one-digit numbers: Students find it difficult to remember the answer for tables of double-digit and single-digit numbers. For this, you will require the basic ...
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