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Factor comun 2 bis
Contributed by: Margit
78 • 197 + 197 • 22 =
98 • 56 + 56 • 2 =
789 • 9 + 789 =
545 • 112 - 12 • 545 =
38 • 257 + 257 • 62 =
79 • 21 - 11 • 79 =
302 • 230 - 302 • 130=
88 • 125 - 25 • 88 =
98 • 75 + 98 • 25 =
193 • 65 + 193 • 35 =
245 • 37 - 36 • 245 =
23 • 98 + 2 • 23 =
567 • 35 - 25 •  567 =
15 • 789 - 5 • 789 =
37 • 245 - 245 • 36 =
96 • 42 + 42 • 4 =
273 • 99 +  273 =
179 • 99 + 179 =
112 • 93 + 42 • 112 - 112 • 32 =
Scrie ca produs de două numere naturale:
58 • 67 + 67 • 42 + 67 =
65 • 47 + 23 • 47 =
47
112 •
67
Dacă  a + = 15 atunci 3a + 3b =
Dacă  a + 2= 7 atunci 5a + 10b =
Dacă  a + b = 7 atunci 5a + 5b =
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