12×( + ) | 24× -![]() | × ÷![]() |
86×![]() | × + ÷7 | ÷( + ) |
+
)=12×
+12×
=8+2
=10;
②24×
-
=
-
=2
;③
×
÷
=
×
×
=
;④86×

=(85+1)×

=85×
+1×
=4+

=4
;⑤
×
+
÷7=
×
+
×
=(
+
)×
=
×
=
; ⑥
÷(
+
)=
÷
=
.分析:根据分数的四则混合运算顺序进行计算,能用简便方法的可用简便方法计算.
点评:此题主要考查的是分数的四则混合运算和分数的简便计算.