slojenie i vichitanie chisel do 20

slojenie i vichitanie chisel postav chisla v poryadke vozrastaniya; zapishi chisla v poryadke ubivaniya. 13 20 10 18 15 14 zapishi chislo v kotorom: 1 des. i 3 ed.; kotoroe sleduet za chislom 19; kotoroe predshestvuet chislu 11; kotoroe stoit mejdu chislami 17 i 19; kotoroe bolshe chisla 14 na 1; kotoroe menshe chisla 15 na 1 zapishi chislo v kotorom: 1 des. i 3 ed.; kotoroe sleduet za chislom 19; kotoroe predshestvuet chislu 11; kotoroe stoit mejdu chislami 17 i 19; kotoroe bolshe chisla 14 na 1; kotoroe menshe chisla 15 na 1 13 20 10 18 15 14 10 + 6 = 10 + 7 = 8 + 10 = 12 – 10 = 15 – 10 = …

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