能简算的要简算47×512+512×37(23-49)×3294×99+9425×1716-116×25121×7120119×7120.-数学

32-
4
9
×
3
2

=1-
2
3

=
1
3


(3)
9
4
×99+
9
4

=
9
4
×(99+1)
=
9
4
×100
=225;

(4)
2
5
×
17
16
-
1
16
×
2
5

=
2
5
×(
17
16
-
1
16

=
2
5
×1
=
2
5


(5)121×
7
120

=(120+1)×
7
120

=120×
7
120
+1×
7
120

=7+
7
120

=7
7
120


(6)119×
7
120

=(120-1)×
7
120

=120×
7
120
-
7
120

=7-
7
120

=6
113
120

据专家权威分析,试题“能简算的要简算47×512+512×37(23-49)×3294×99+9425×1716-116×251..”主要考查你对  分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: