Addition
2+2
4
20-20
0
67, 77, 87, 97 __, __, __,
107,117,127
450 ----> 750
+300
500-80
420
5+5
10
25
10 more than 175 is
185
431 - ___ =131
300
2500+1500
20+20
40
300-100
200
760-500=
768 - ___ = 68
700
850-450
400
50+50
100
600-60
540
500,___,1,500,___,
1000 , 2,000
389 ----> 589 is
+200
10 more than 946 is
956
100+100
200
1500-530
970
499 is 100 less than
599
____ - 500 = 356
144
10 less than 790
780