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example 2: Add 35 and 12.
Solution:
Step 1. Add the ones first. Step 2. Add the tens next.
Tens Ones Tens Ones
3 5 3 5
+ 1 2 + + 1 2 +
7 4 7
Thus, 35 + 12 = 47. www
example 3: find: 64 + 25. MAths connect Cross-Curricular Learning
Solution: A standard size football is made
up of pentagons and hexagons. There
Tens Ones Tens Ones are 12 pentagons and 20 hexagons. How
6 4 6 4 many pieces are used altogether?
+ 2 5 + 2 5 Hexagon
9 8 9 Pentagon
Thus, 64 + 25 = 89.
Practice time 7C
Add the following.
1. Tens Ones 2. Tens Ones 3. Tens Ones 4. Tens Ones
2 5 5 6 3 3 7 7
+ 2 4 + 4 1 + 2 5 + 2 1
5. Tens Ones 6. Tens Ones 7. Tens Ones 8. Tens Ones
6 7 4 6 2 5 2 1
+ 2 0 + 2 2 + 6 0 + 7 0
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