Lesson 11: Large Number Addition (125 + 278)
Advanced Level
Instructions
- Let's add 125 + 278 across three columns.
- Set 125: Hundreds (1 blue bead = 100), tens (2 blue beads = 20), ones (red bead = 5).
- Add 278: Hundreds (add 2 blue beads = 300), tens (add red bead + 2 blue beads = 70), ones (add 3 blue beads = 8).
- With carries: ones (5+8=13, carry 1), tens (20+70+10=100, carry 1), hundreds (100+200+100=400).
- The value should be 403!
T
100B
10B
B
100M
10M
M
100K
10K
K
100
10
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
5
1
1
1
1
Value: 0