adding
333+142
333
+
142
--------
475
round by 500
A.500
B.600
C.700
A.500
subtract 80-30
50
show a whole fraction
A.1/4
B.3/4
c.7/4
1/4
2x4=
8
555+324
555
+
324
-------
879
round to 200
A.100
B.200
C.300
C.300
subtract 40-27=
13
show a half-fraction
A.6/3
B.1/1
C.7/6
A.3/6
3x6=
18
990,148+321,123=
990,148
+
321,123
-----------
1,311,271
found by 400
A.400
B.500
C.300
B.500
subtract 10,124- 983=
9141
A whole fraction
A.1/7
B.7/7
C.4/2
B.7/7
10x10=
100
999,999=
1998
round to 900,000
A.1,000,000
B.900,000
C.800,000
A.1,000,000
9,870-972
8,788
4/3
A.4/3
B.
4/3
10x90=
900
989,180
1169
round to 1,000,000
A.2,000,000
B.10
C.1,000,000
C.1,000,000
9,827
- 10,936
-----------
A.12,667
B.89.927
c.0991
C.0991
0991
50x5=
250