Mental Math
What is 10 more than 57
67
52-37=
15
734-458=
276
What is 10 less than 259
249
20
80
What is 10 less than 134
124
90-39=
51
602-389=
213
what is 10 more than 605
615
25
75
What is 10 less than 500
490
82-55=
27
815-467=
348
what is 10 less than 714
704
55
45
What is 10 more than 900
910
43-19=
24
940-672=
268
what is 100 more than 913
1,013
19
81
What is 100 more than 972
1,072
56-27=
29
503-288=
215
What is 100 less than 243
143
47
53