Double Digit Addition
12 + 11
23
20 - 10
10
20
15 + 2 =
Which of the following is a double digit number? 30 , 3 or 300?
30
23 + 22
45
40 - 20
20
20 + 30
50
25 + 3
28
How can you tell this problem is wrong? 84 + 3 = 15
The addends CANNOT be greater than the sum.
36 + 25
61
60 - 20
40
40 + 40
80
38 + 5
43
Which place should you solve first when doing a double digit addition problem? the Tens or the Ones place?
Ones Place
52 + 38
90
70 - 30
40
60 + 30
90
49 + 5
54
How many tens does it take to make 100?
Ten 10
65 + 27
92
80 - 50
30
50 + 50
100
91 + 7
98
If you want to solve 90 - 20 with a 120 chart... you should start at 90 and move which direction?
Up Two Places