Question

need explanation for subtract 100 on abacus means putting two beads in the 100's spike
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Answer 1

पद-परिचय को समझने से पहले शब्द ... परिचय देना ही पद-परिचय कहलाता ... क्रियाविशेषण – मैं अभी और ...

Answer 2

The mole is the unit of measurement for amount of substance in the International System of Units. A mole of a substance or a mole of particles is defined as containing exactly 6.02214076×10²³ particles, which may be atoms, molecules, ions, or electrons.