Addition Strategies
The strategy using cubes
Base 10 Blocks
34 + 22
56
123 + 456
579
1234 + 4321
5555
22 + 44 + 66
132
The strategy where you take the numbers apart based on place value, then add them together
Decomposing Numbers
75 + 15
90
137 + 129
266
1259 + 1428
2687
15 + 65 + 115
195
The strategy where you add the numbers from each place value vertically first, then add all the numbers together
Vertical Addition
99 + 55
154
364 + 349
713
2287 + 3264
5551
27 + 154 + 219
400
The most common strategy, where you show regrouping
Algorithm
78 + 49
127
564 + 389
953
4896 + 1214
6110
345 + 267 + 123
735
The strategy where numbers are rounded, added together, then add/subtract numbers not used before
Compensation
86 + 79
165
586 + 752
1338
8569 + 7458
16027
1869 + 452 + 378
2699