能简算的要简算.
57.5﹣4.25﹣15.75÷[
×(
+
)]
×16.31﹣2.31÷
(54+)÷99.25×9.9+92.5%36÷[(
﹣
)×3].
3.125×(1.6+2)÷(2
﹣0.625)
×
×
+
×
×
+
×
×
+
+
(1﹣0.8)÷0.63﹣(
÷0.45﹣1
)
(3+1
×7)÷1
﹣1
67×+2
×3.75﹣4
×25%
789×788788﹣788×789789.
计算下面各题.
3+1.5÷2.5÷48﹣4.4×0.25120+600÷24×6÷
(
﹣
)×11×6
÷(
﹣
)÷
.
脱式计算,能简便运算的要简便.
(1)2.3×1.5+4.5÷0.75(2)÷[
×(
+
)]
(3)(﹣
)÷
+22÷51(4)
×
+
×
.
脱式计算.
(1)×[
﹣(
﹣
)](2)
÷
+
×
(3)(
+
)÷
+
(4)2.5×12.5×40×0.8(5)3.64÷4+4.36×25%(6)78×.