计算:
×[
﹣(
﹣
)] [
﹣(
﹣
)]÷
÷
+
×
1.3﹣3.79+9.7﹣6.21 68×35﹣408÷24 47.5﹣(0.6+6.4÷0.32)
1
+
÷4﹣
÷(
×
)﹣1
÷[
﹣(
+
)]
(
﹣
)×15.
递等式计算,能简算的要简算
0.11×1.8+8.2×0.110.8×(3.2﹣2.99÷2.3) (8.1﹣5.4)÷3.6+85.7.
下面各题怎样算简便就怎样算.
18.65﹣3.7+1.35﹣6.330×[3.61÷(7.2﹣5.3)]
36÷[1.44×(0.1﹣0.05)](16.5×3+3×7.5)÷6.
神机妙算:
0.8×6.5﹣
×3.5(
+
)×451﹣
÷
+
25×1.25×3299×
+
1
﹣
﹣
.
(1)79.76+84.7×0.2(2)15.37+28.44+12.56
(3)(2.3×8.8﹣2.3×0.8)×1.25(4)[5.2﹣(2.5+7.5÷5)]×1.2.
用递等式计算,能简便计算的用简便方法计算
(1)37.7÷13+1.8×2.4
(2)1.25×3.2×0.25
(3)1.06×(2.9+1.6)÷0.01
(4)6.27×5.2+5.8×6.27﹣6.27
(5)50.5÷[(15.6﹣3.5×4)÷3.2].