Fluency doesn't just happen with addition and subtraction strategies and models for teaching the basic facts por Newton, Nicki, Mello, Alison J., Record, Ann Elise

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Speed math subtraction & division por Jensen, Paz A. Lacsamana-

Fundamentals of digital subtraction angiography for radiology technologists por Soriao, Renato M.

Subtracting por Patilla, Peter

Addition and subtraction a cognitive perspective

Subtraction drill for levels 1-3 por Mock, Valerie E.

Subtraction por Jones, Graham

A 6-GSamples/s multi-level decision feedback equalizer embedded in a 4-bit time-interleaved pipeline A por Varzaghani, A.

Technology improvements for image-guided and minimally invasive spine procedures. por Cleary, K.