递等式计算，能简便运算的要用简便计算方法计算．
800×84﹣24030÷270 13.5×
+13
×3
+13.5
12.2+3.05×（5﹣1.75×2
） 5
×[（9
﹣8.05+
）÷3
]．
相关试题
递等式计算，能简便运算的要用简便计算方法计算．
800×84﹣24030÷270 13.5×+13×3+13.5
12.2+3.05×（5﹣1.75×2） 5×[（9﹣8.05+）÷3]．
×
=
×
×
=
÷3= 12×
=
+
﹣
+
=
= 18÷
÷
=
= 0×
=
×
÷
= 2﹣
=
+
= 6×
= 0.25×4= 57×
=
÷
= 1÷
= 21÷
=
÷
= 1÷
= 0÷
=
×21×
÷5×
÷
÷
÷
÷24
×
÷8．
×9=
×0= 0÷
=
÷
=
×
=
÷
=
÷
=
×
=
÷5=
×12=
×
=
÷
÷
=
×
= 1÷
=
= 45×
=
÷2=
÷
=
×
=
=
×0=
×
= 1﹣
=
÷
=
×
= 15÷
=
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