Michael has 26 stickers on his daily reading chart. By the end of the month he will have 28 more stickers. About how many stickers will Michael have at the end of the month?
60 stickers
Estimate the difference
95- 24=
100-20- 60
Estimate the sum
24+18=
20+20=40
Alex had a bag with 65 cookies in it. He gave 25 to his classmates. About how many cookies does Alex have left?
40 cookies
Estimate the difference
54-23=
50-20=30
Estimate the sum
72+13=
70+10=80
Luca has 18 toy dinosaurs. He gives 9 to his brother. About how many toy dinosaurs will Luca have left?
30 toy dinosaurs
Estimate the difference
83-18=
80-20=60
Estimate the sum
45+18=
50+20=70
Lane has 82 bouncy balls. He finds 12 more. About how many bouncy balls will Lane have?
90 bouncy balls
Estimate the difference
47-13=
50-10=40
Estimate the sum
38+22=
40+20= 60
Marissa has 24 books. She buys 18 more. About how many books will Marissa have?
40 books
Estimate the difference
68-43=
70-40=30
Estimate the sum
74+32
70+30=100