Analisa has learned the following facts well: all the sums…

Questions

Anаlisа hаs learned the fоllоwing facts well: all the sums оf whole numbers that add to 10 or less; Analisa knows these facts “forwards and backwards,” for example, she knows not only that 4+3 is 7, but also that 7 breaks down into 4 + 3; 10 + 1, 10 + 2, 10 + 3, . . . , 10 + 10; the doubles 1 + 1, 2 + 2, 3 + 3, . . . , 10 + 10. Describe three different ways that Analisa could use reasoning together with the facts she knows well to calculate 7 + 6. In each case, write equations that correspond to the method you describe. Take care to use parentheses appropriately and as needed and indicate any properties used in each method.