Simple operation;

6.9+4.8+3. 1 0.456+6.22+3.78 15.89+(6.75-5.89)

4.02+5.4+0.98 5. 17- 1.8-3.2 13.75-(3.75+6.48)

Fractional mixed operation;

3/7 × 49/9 - 4/3 8/9 × 15/36 + 1/27 12× 5/6 – 2/9 ×3

4/5 × 25/ 16 + 2/3 × 3/4 1/5 × 2/3 + 5/6 8/7 × 2 1/ 16 + 1/2

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