Penguin Feeding Time: Subtract Tens
0 / 12Penguin Feeding Time: Subtract Tens
Take away tens to solve zoo problems.
Fish Buckets
Each bucket holds 10 fish. Think in tens to subtract.
1.
The zookeeper has 8 buckets of fish. Each rod shows one bucket of 10 fish. The penguins eat 5 buckets.
8 tens − 5 tens = tens
80 − 50 = fish
2.
Count back by tens to find 90 − 40.
90, , , ,
90 − 40 =
3.
Pip the penguin slides back on the number line. Pip starts at 70 and stops at 30. How far back did Pip slide?
70 − = 30
4.
Use addition to help you subtract.
40 + = 60
So 60 − 40 =
5.
The penguins ate 90 fish today. The seals ate 60 fish today. How many more fish did the penguins eat than the seals?
The penguins ate more fish.
6.
There are 30 penguins in the pool. 10 penguins get out to eat. How many penguins are still in the pool?
30 − 10 = penguins
Feeding Chart
Choose, match, circle, sort, and explain.
7.
There are 50 penguins on the rocks. Then 30 penguins jump into the water. Which number sentence tells how many penguins are still on the rocks?
8.
Match each problem to its answer.
9.
The zookeeper checks the feeding chart. Circle every number sentence that is true.
10.
Solve each problem. Sort it by its answer.
11.
Some fish were in a cooler. The zookeeper took out 40 fish. Now there are 50 fish left in the cooler. How many fish were in the cooler at first?
− 40 = 50
12.
Leo has 60 fish in a bucket. He feeds 20 fish to the penguins. Then he feeds 20 fish to the puffins. How many fish are left in the bucket? Show how you know.