RB adding
17+40=
57
5+7=
12
round 16 to the nearest 10
20
8 - 1 =
7
20+62=
82
6 + 8 =
14
round 78 to the nearest 10
80
9 - 3 =
6
55+19=
74
8 + 5 =
13
round 56 to the nearest ten
60
5 - 2 =
3
65+43=
108
7 + 9 =
16
round 104 to the nearest hundred
100
3
82+55=
137
12 + 5 =
17
round 167 to the nearest hundred
200
16 - 9 =
7