Add w/o regrouping
35 + 3=
38
24+ 7=
31
76-2=
74
56-9=
47
Do you start from the ones or tens place first?
ones
12+ 4=
16
72+ 9=
81
65-1=
64
78-9=
69
Why, when you add, do you carry the number over to the tens place?
Because the ones place answer (sum) was bigger than 10
54+ 5=
59
47+ 7=
54
89-7=
82
32-7=
25
Why, when you subtract, do add 10 to the ones place?
Because you are taking 10 from the tens place over to the ones place.
123+ 4=
127
23+17=
40
41-1=
40
15-8=
7
What is wrong with this equation? (add with carry)
Forgot to add the number carried over
345+ 3=
348
137+4
141
32
256-7=
249
What is wrong with this problem? (subtract with regroup)
did not start with the ones place