SME
Grade 1 Math · Measurement & Data
Use units to measure length
Use this for “How many cubes long is the pencil? How much longer is it than the crayon?”
Picture
Pencil is 3 cubes longer.
Crayon is 3 cubes shorter.
Both start at the same line. Count the cubes past the dashed line.
This is an example. Type the numbers from your problem to start.
Pencil
example · cubes
Crayon
example · cubes
How much longer
answer · cubes
Number sentences
Line up 9 and 6: 3 cubes longer
Good to know
•
Lay the cubes end to end. No gaps. No overlaps.
•
Start at the end of the object.
Step-by-step
WE KNOW
Pencil: 9 cubes
Crayon: 6 cubes
FIND
how much longer
Step 1 · Find how much longer
Line up 9 and 6: ? cubes longer
Line up the ends. Count up from the shorter one.
9 − 6
The pencil is longer.
How much longer: 3 cubes
Check
Put the numbers back in. Both sides should match.
9 − 6 = 3 ✓
Topic check
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More problem types
Order objects by length
Use this for “Put the ribbons in order from longest to shortest.”
Use units to measure length correctly
Use this for “Leo says the strip is 6 clips long. Is he right?”
Compare lengths indirectly
Use this for “The pencil is longer than the crayon. The crayon is longer than the clip. Which is longer, the pencil or the clip?”