Suma por descomposici贸n 45 40
+
+ 5
24 = 69 20 + 4
60 + 9 69 Ahora t煤: 36 __
+
+ _
52 = __ __ + _
__ + _ __
34 __
+
+ _
35 = __ __ + _
__ + _ __
20 __
+
+ _
38 = __ __ + _
__ + _ __
ยกAhora sin las rayitas! 25
+
13 =
63
+
25 =
45
+
40 =
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