Hard 1
56+47
103
97+98
195
123+97
220
533+257
790
1956+955
2911
56-47
9
65-36
29
123-97
26
533-257
276
1956-955
1001
15x12
180
18x16
288
25x17
425
123x34
4182
125x120
15000
160/8
20
512/4
128
4/5 change into percent
80%
3/4 percent
75%
729/9
81
75/100 simply
3/4
20/100 simply
1/5
1/4 percent
25%
7/10 percent
70%
2565+1557
4122