Skill Development/Guided Practice
To count down is to count backwards from a number.
• Numbers can be subtracted by counting down.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1.
2.
3.
4.
5.
6.
7. There were eight frogs
sitting on a log. Three frogs
jumped off the log.
8. There were seven birds
sitting in the tree. Two birds
flew away.
frogs
birds
How many frogs were left
sitting on the log?
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How many birds were left
sitting in the tree?
Subtract numbers by counting down.
Skill Development/Guided Practice (continued)
1. Marco was asked to subtract 16 - 4 by counting down.
He started at 15 and his answer was 11. Do you agree
with him? Why or why not?
2. Wilhelm was asked to subtract 12 - 6 by counting
down. He started at 12 and his answer was 7. Do you
agree with him? Why or why not?
CFU
1
2
3
4
5
How did I/you know what to find?
How did I/you figure out what I/you know about the idea?
How did I/you identify what amounts I/you know?
How did I/you solve the problem?
How did I/you check if I/you answered all the parts of the
question?
©2016 All rights reserved.
Subtract numbers by counting down.
Name
Independent Practice
To count down is to count backwards from a number.
• Numbers can be subtracted by counting down.
Subtract numbers by counting down.
1 Read the subtraction problem.
2 Subtract the numbers.
a Start from the first number.
b Count down using the second number.
3 Read the problem and the answer.
1.
2.
3.
4. There were seven cats
sitting on a fence. Five cats
ran away.
cats
How many cats were left
sitting on the fence?
©2016 All rights reserved.
Subtract numbers by counting down.