What ones digit subtraction fact would help you solve 20-10?
2-1=1
100
Is there missing or extra information?
9 ladybugs crawl on a leaf. 3 catepillars join. Then 2 ladybugs fly away. How many ladybugs are left on the leaf?
There is extra information.
100
Count on ones to make a ten. Then add tens to make 100.
89+ ___= 100
1 one
1 ten
89+11=100
100
How would you use a hundreds chart to find 30-20?
You would start at 30, then you can jump up to rows to subtract 20. You will land on 10.
200
40-20=
20
200
What ones digit subtraction fact could help you solve 50-20?
5-2=3
200
Is there extra or missing information?
Jan buys 6 fantasy books at the book store. Then she buys 3 science fiction books. She gives some books to her friends. How many books does she have left?
There is missing information and extra information.
200
Count on to make a ten.
73+___=100
7 ones
2 tens
73+27=100
200
How can you use a hundreds chart to find 33-13?
You start at 33. You can jump up one row to subtract 10. Then you hop 3 to the left to subtract 3 more. You will land on 20.
300
86-50=
36
300
What ones digit subtraction fact could help you solve 60-50?
6-5=1
300
Try to make an equation to solve. If there is missing information, write "missing information."
Jan picks 14 flowers. Then she gives 8 to her friend Suzy. How many flowers does she have left?
14-8=6
300
Count on ones and tens to make 100.
58+___=100
2 ones
4 tens
58+42=100
300
How can you use a hundreds chart to find 84-63?
You start at 84. You jump up 6 rows to subtract 60. Then you jump to the left 3 times to subtract 3 more. You will land on 21.
400
94-30=
64
400
What ones digit fact could help you solve 80-40?
8-4=4
400
Write an equation to solve. If it is missing information, write "missing information."
Candace bakes 12 cupcakes. Her and her brother eat some. How many cupcakes are left?
Missing information
400
Count on ones and tens to make 100
32+___=100
8 ones
6 tens
32+68=100
500
99-40=
59
500
What ones digit subtraction fact could help you solve 90-20?
9-2=7
500
Is there missing or extra information? If possible, write an equation to solve.
Rachel visits the zoo. She sees 8 alligators. She also sees 2 birds in a nearby tree. Then some alligators disappear. Now she sees 5. How many alligators disappeared?
Extra: 2 birds
8-5=3
500
Count on ones and tens to make 100.
77+___=100
3 ones
2 tens
77+23=100
500
How can you use a hundreds chart to find the difference for 97-45?
You start at 97. Then you jump up 4 rows to subtract 40. Then you jump over 5 to the left to subtract 5 more. You will land on 52.