题目内容

脱式计算,能简算的要简算
907×99+907
4
5
+
1
4
)÷
7
3
+
7
10

5
7
+
5
6
+
2
7
+
1
6

15
16
+(
7
18
-
1
4
)÷
1
2
(1)907×99+907,
=907×(99+1),
=907×100,
=90700;

(2)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
×
3
7
+
3
10

=
9
20
+
3
10

=
15
20

=
3
4


(3)
5
7
+
5
6
+
2
7
+
1
6

=(
5
7
+
2
7
)+(
5
6
+
1
6
),
=1+1,
=2;

(4)
15
16
+(
7
18
-
1
4
)÷
1
2

=
15
16
+
5
36
×
2,
=
15
16
+
5
18

=
135
144
+
40
144

=1
31
144
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