0.25×3.7×40 7.86×99+7.86
①2.8×3.6+1.4×2.8
②4.75×101
③3.17×1.2+1.83
④4.95-14.82÷7.6
⑤12.5×16×2.5
①2×0.7×1.5
②0.81×10×0.1
③5×0.2×1.3
④3.1×3×0.4
纯牛奶:5.5元/瓶
酸奶:6.5元/瓶