计算下面各题,能简算的要简算.
①[3.2×(1﹣58 )+335]×2112②137+2415+447+3215
③4397×99④1.8×25%+2.2×25%
脱式计算.(怎样简便怎样算)
51.7+46.05÷1.5﹣9.3
857×1.9﹣8.57×80﹣85.7÷((
+
)×
)
27×(+
)×25
45×(+
﹣
)
÷(4÷
)+
.
能简算的要简算
①9﹣0.64﹣0.36
②1.8×+2.2×25%
③6.25﹣40÷16×2.5.
用简便方法计算.
(1)2.25×4.8+77.5×0.48(2)6.68﹣3.25﹣1.75.
12.56﹣6.64﹣3.3645.5﹣(0.98+5.5) 6+7.94+6.43.75×4.8+62.5×0.48.