1. 3.7 + 2.8 = 6.5
3 + 2 + 0.7+ 0.8
= 5 + 0.7 + 0.8
= 5 + 1.5
= 6.5
2. 2.9 + 4.6 = 7.5
2 + 4 + 0.9 + 0.6
= 6 + 0.9 + 0.6
= 6 + 1.5
= 7.5
3. 9.7 + 7.5 = 17.2
9 + 7 + 0.7 + 0.5
= 16 + 0.7 + 0.5
= 16 + 1.2
= 17.2
4. 6. 9 + 2 .3 = 9.2
6 + 2 + 0.9 + 0.3
= 8 + 0.9 + 0.3
= 8 + 1.2
9.2
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