reading between the lines, the above concepts are from the Indian astronomers and mathematicians who gave us zero as a number and our base ten number system.
* A.) No. The person making this claim admits to a slight overstatement. The presumption is that you know what numbers are, and have mastered counting.
Also the presumption is you know what a unit is. And the presumption is you know that quantity is the interplay of magnitude and multitude and that magnitudes can increase and decrease and multitudes can increase and decrease.
Without going all 'Bertrand Russell' any person who claims all mathematics is just addition and multiplication must surely include within their argument, at least the following:
A definition of mathematics. A definition of addition. A definition of multiplication.