题目内容

脱式计算,能简算的要简算.
5
11
×
7
9
+
7
9
×
6
11
51×10110.25-3.75-6.25+7.75
35×12+350÷703+0.7÷[(
5
6
-
1
4
)×24]
1
3
÷
6
5
×
9
10

(1)
5
11
×
7
9
+
7
9
×
6
11

=(
5
11
+
6
11
)×
7
9

=1×
7
9

=
7
9


(2)51×101,
=51×(100+1),
=51×100+51×1,
=5100+51,
=5151;

(3)10.25-3.75-6.25+7.75,
=(10.25+7.75)-(3.75+6.25),
=18-10,
=8;

(4)35×12+350÷70,
=420+5,
=425;

(5)3+0.7÷[(
5
6
-
1
4
)×24],
=3+0.7÷[
5
6
×24-
1
4
×24],
=3+0.7÷[20-6],
=3+0.7÷14,
=3+0.05,
=3.05;

(6)
1
3
÷
6
5
×
9
10

=
5
18
×
9
10

=
1
4
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