Adding Tens
10+30
40
40-20
20
Some children wrote letters. 22 children wrote friendly letters. The other 40 children wrote business letters. How many children wrote letters?
62.
34+30
64
53-20
33
Dan Dan counted 49 large rocks and 10 small rocks. How many rocks did Dan Dan count?
59
56+20
76
87-70
17
Emily's team scored 55 points. Emily scored 30 of the points. How many points did the other players score?
25
45+50
95
98-50
48
Paige went on 72 walks. 43 of her hikes were on trails, and 12 of her walks were on the beach. How many of her walks were not on trails or the beach?
17
12+80
92
79-40
39
Dominic planted 42 trees on Wednesday and 30 Thursday. Someone dug up 10 trees on Friday. How many trees were left ?
62