问题 解答题
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.
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.

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