脱式计算.(能简算的要简算)①14.8-44.08÷5.8②7.5×23+7.5÷34③14+37+47÷4④3.35×6.4×2+6.7×3.6.-数学

题文

脱式计算.(能简算的要简算)
①14.8-44.08÷5.8
②7.5×
2
3
+7.5÷
3
4

1
4
+
3
7
+
4
7
÷4
④3.35×6.4×2+6.7×3.6.
题型:解答题  难度:中档

答案

①14.8-44.08÷5.8,
=14.8-7.6,
=7.2;

②7.5×
2
3
+7.5÷
3
4

=7.5×
2
3
+7.5×
4
3

=7.5×(
2
3
+
4
3
),
=7.5×2,
=15;

1
4
+
3
7
+
4
7
÷4,
=
1
4
+
3
7
+
4
7
×
1
4

=
1
4
+
3
7
+
1
7

=
1
4
+(
3
7
+
1
7
),
=
1
4
+
4
7

=
23
28


④3.35×6.4×2+6.7×3.6,
=(3.35×2)×6.4+6.7×3.6,
=6.7×6.4+6.7×3.6,
=6.7×(6.4+3.6),
=6.7×10,
=67.

据专家权威分析,试题“脱式计算.(能简算的要简算)①14.8-44.08÷5.8②7.5×23+7.5÷34③..”主要考查你对  运算定律和简便算法,分数的简便算法,小数的四则混合运算及应用  等考点的理解。关于这些考点的“档案”如下: