①1.25×0.67×80
②14.7-4.7×0.8
③8.13-5.6+1.87
④4.35×6.8+3.2×4.35
⑤18×0.4+5.6
⑥16×(12.4-9.8)
0.25×17.3×4 4.23×99+4.23 (8+0.8)×1.25