Vertical Addition by Partition with 2-digit Numbers 79 + 69 130 (70 + 60) Add the tens 18 (9 + 9) Add the units 148 Vertical Addition by Partition with 3-digit Numbers 864 + 983 1700 (800 + 900) Add the hundreds 140 (60 + 80) Add the tens 7 (4 + 3) Add the units 1847 |