Question

1.8+2.6= 2.5×4= 12.5×8= 1.65÷（6.5÷6.5）= 4.8+8= 0.5+9= 0.53-0

Answer 1

1.8+2.6=4.4 2.5×4=10 12.5×8=100 1.65÷（6.5÷6.5）=1.65

4.8+8=12.8 0.5+9=9.5 0.53-0.4=0.13 0.8+0.2×4=1.6

7.5-7.5=0 0.6×9=5.4 7-1.5=5.5 5.9×3.6×0=0．