100
+
400
=
____________________
234
.
5
-
4
.
5
=
____________________
20
*
10
-
100
=
____________________
3x
-
5x
=
-
____________________
-
50m
-
50m
=
____________________
30
-
6
*
4
=
____________________
1
/
2
+
2
/
4
+
4
/
8
=
____________________
.
____________________
250
/
5
-
40
=
____________________
3
*
3
*
3
*
3
/
(
3
*
3
)
=
____________________
5
*
5
*
5
*
5
*
5
/
5
=
____________________
5
.
9
+
0
.
1
+
1
.
1
=
____________________
.
____________________
25
*
8
-
25
=
____________________
