Math Skill: Basic Addition to 100
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Basic Addition to 100

You must know fast addition to master this topic.
To review, see the Fast Addition topic.

Add by place value, starting with the ones column first and then the tens column.

 28 +31 59
8 + 1 = 9
2 + 3 = 5

Examples:

 40 +10 50

 4 +20 24

 32 +46 78

 23 +13 36

### Complexity=50, Mode=1

Add. Press the TAB key to move to the next problem.
1.
 6+ 42
2.
 1+ 10

### Complexity=100, Mode=1

Add. Press the TAB key to move to the next problem.
1.
 10+ 4
2.
 90+ 6

### Complexity=50, Mode=2

Add. Press the TAB key to move to the next problem.
1.
 22+ 11
2.
 31+ 14

### Complexity=100, Mode=2

Add. Press the TAB key to move to the next problem.
1.
 31+ 12
2.
 87+ 10

### Complexity=50, Mode=1

Add. Press the TAB key to move to the next problem.
1
 6+ 42
Solution
2
 1+ 10
Solution

### Complexity=100, Mode=1

Add. Press the TAB key to move to the next problem.
1
 10+ 4
Solution
2
 90+ 6
Solution

### Complexity=50, Mode=2

Add. Press the TAB key to move to the next problem.
1
 22+ 11
Solution
2
 31+ 14
Solution

### Complexity=100, Mode=2

Add. Press the TAB key to move to the next problem.