Subtracting Tens
36-10=?
50+___=100
50
What I go down on a hundred chart, am I adding 10 or subtracting 10?
Adding 10
True or False? 30-20=10.
True
Mrs. LaHiff has 5 cookies. She bakes 10 more. She also has 1 dog. How many cookies does Mrs. LaHiff bake?
Does this story have extra information or missing information?
Extra information
75-20=?
55
75+___=100
25
83-21=?
62
40-20=?
20
There are 6 bees on a flower. Then some left. How many bees are there now?
Does this story have extra information or missing information?
Missing information
77-40=?
37
34+___=100
66
64-23=?
41
80-50=?
30
Madison has 9 dolls. She gives 2 dolls away. She has 3 bears. How many dolls does she have left?
7 dolls
48-20=?
28
84+___=100
16
76-12=?
64
60-20=?
40
Mrs. LaHiff has 7 cars. She has 9 boats. Then she buys more cars. How many cars does she have now?
Missing information
True or False? 63-50=23.
False
57+___=100
43
____-15=_____ Fill in the two spaces.
____-30=20.
50
Ms. Lester has 10 pencils. She also has 8 erasers. Ms. Lester gave away 7 pencils. How many pencils does she have left?
3 pencils