Comparing lengths

Kindergarten · Level 3 · Sheet 1

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the answers

Name Date

Circle the answer.

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1.
Which one is longest?
a
b
c
acb
2.
Which one is longest?
a
b
c
cab
3.
Which one is longest?
a
b
c
cab
4.
Which one is longest?
a
b
c
acb
5.
Which one is longest?
a
b
c
cab
6.
Which one is longest?
a
b
c
abc
7.
Which one is longest?
a
b
c
acb
8.
Which one is longest?
a
b
c
cab
9.
Which one is longest?
a
b
c
acb
10.
Which one is longest?
a
b
c
abc
11.
Which one is longest?
a
b
c
bca
12.
Which one is longest?
a
b
c
abc

Show the answer key

1.b
2.c
3.a
4.a
5.b
6.b
7.b
8.b
9.c
10.c
11.a
12.c

The mistakes behind most wrong answers

A wrong answer in comparing lengths is rarely random. These are the ones that come up most often, each on a real problem — worth knowing before you mark a sheet, because the fix for each is different.

Which one is longest?
a
b
c
The answer is b. A child who answers c probably chose the smaller one.
Which one is longest?
a
b
c
The answer is c. A child who answers b probably judged length by where it ended, not how long it was.

In the app, every wrong answer is matched against mistakes like these, and the weekly email tells you which one your child keeps making — in those words, not as a percentage.

Answer key · Comparing lengths · Level 3 · Sheet 1

The mistakes behind most wrong answers