Add the tens column :
Add the tens column Place the numbers, one above the other, so that units & tens are in the right place.
Add the ‘units’ column:
2+5=7.
The sum is.
Place the sum under the units on the total line. 7 2 8 5 4 tens units 7 = 5 + 2
Add the tens column :
Add the tens column Add the tens column:
8+4=12.
The sum is.
Place the 1 under the hundreds at the top and the 2 under tens on the total.
Place the sum under the units on the total line. 7 2 2 8 5 4 1 12 = 4 + 8
Add the hundreds column :
Add the hundreds column Add the hundreds column:
+1=1.
The sum is.
Place the sum under the hundreds on the total line. 7 2 2 8 5 4 1 1 1 = 1 +
Slide 5:
Place the numbers, one above the other, so that units, tens & hundreds are in the right place.
Add the ‘units’ column:
2+5=7.
The sum is 7 units.
Place the 7 under the units on the total line. 4g 4f 4e 4d 4c 4b 4a 3g 3f 3e 3d 3c 3b 3a 2g 2f 2e 2d 2c 2b 2a 1g 1f 1e 1d 1c 1b 1a = c b + a 4g 4f 4e 4d 4c 4b 4a