Adding larger numbers in your head is not always easy. If you need to use pen and paper, then the column method is a good way to add. It involves writing one number beneath the other, so that the ...
CID (Central R&D) Desc, Chemical Sector, Avenida de los Sauces No. 87 Parque Industrial Lerma, Lerma Edo. de México C.P. 52000, México, and Universidad Autónoma Metropolitana Iztapalapa, Ciencias ...
Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Canada K1A 0R6, and Dipartimento di Chimica “G. Ciamician”, Università di Bologna, 40126 Bologna, Italy Article ...
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