Addition
dimanche 20 avril 2008
par
par

Complétez :
A = (+9) + (–19) = ... | B = (–9) + (–19) = ... |
C = (+19) + (–9) = ... | D = (+19,1) + (+1,9) = ... |
E = (–8,6) + (+6,8) = ... | F = (+12,345) + (–13,245) = ... |
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