题目内容

简便计算
43×99+43  
3
7
-
2
5
+
4
7
-
3
5
5
12
×
1
13
-
1
4
÷13   
3.5×98+35×0.2250×
1
5
+250×
4
5
11
3
×12.5×
9
10
×8.
(1)43×99+43,
=43×(99+1),
=43×100,
=4300;

(2)
3
7
-
2
5
+
4
7
-
3
5

=(
3
7
+
4
7
)-(
2
5
+
3
5
),
=1-1,
=0;

(3)
5
12
×
1
13
-
1
4
÷13,
=
5
12
×
1
13
-
1
4
×
1
13

=(
5
12
-
1
4
)×
1
13

=
1
6
×
1
13

=
1
78


(4)3.5×98+35×0.2,
=3.5×98+3.5×2,
=3.5×(98+2),
=3.5×100,
=350;

(5)250×
1
5
+250×
4
5

=250×(
1
5
+
4
5
),
=250×1,
=250;

(6)
11
3
×12.5×
9
10
×8,
=(
11
3
×
9
10
)×(12.5×8),
=
33
10
×100,
=330.
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