Simple calculation of 0.375 × 4 and 3 / 8-3 / 8 + 6.625 × 0.375

375 × 4 3 / 8-3 / 8 + 6.625 × 0.375
=0.375×4.375+6.625×0.375-0.375×1
=0.375×(4.375+6.625-1)
=0.375×10=3.75

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