简便计算,写出简便过程
(1)54×303
(2)7.7×0.73
(3)26.39×36+2.639×830﹣263.9×1.9
(4)272.4×6.2+2724×0.38
(5)2.04×0.25×7.2×12.5.
计算.
0.25×19+0.75×27 (96.5﹣96.5×0.24﹣0.24)÷73.1.
2.4×7.6+7.6×6.5+7.6+0.76.
计算:
(1)13.7×6.5+5.9×13.7﹣12.4×3.7=
(2)50×[(0.2+4.8﹣4.8+0.2)÷2]=
×125×
×8
+
+
×24
×(
﹣
)÷
3÷
+3
÷
7
+8.9+2
+6.10.36×101
20﹣(5.6+4.8)÷1.33.2×(2.15+1.95÷6.5)(+
)÷
+
36×(+
﹣
)