Subtract
45 - 12
33
What does measure mean?
To find how long something is.
What does equal groups mean?
Groups with the same number in each group.
About how many paperclips make 1 foot?
About 12
The playground had 58 balls. 17 balls were put away.
How many balls are still outside?
41 balls
63 - 28
35
What tool do we use to measure inches?
A ruler.
True or False: Equal groups always have the same number.
True
If an object is about 6 paperclips long, estimate: inches or feet?
Inches
The class collected 72 stickers. They gave 29 stickers to another class.
How many stickers do they still have?
43
74 - 29
45
Where should you start measuring on a ruler?
At 0.
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How many groups of apples?
3
If an object is about 15 paperclips long, estimate FIRST: inches or feet?
Feet
Liam thinks his pencil is about 8 paperclips long.
Should he measure it in inches or feet?
Inches
95 - 47
48
What does length mean?
How long something is.
Fix this: 3, 3, 5. What should the last group have?
3
A whiteboard is best measured in...?
Feet
Emma estimates that her notebook is 10 inches long. She measures it and finds it is 9 inches long.
Was her estimate too high or too low?
Too high
100 - 58
42
Why do we line up the object with 0?
To get an accurate measurement.
Mrs. Lee puts 5 pencils in each box. She fills 6 boxes. How many pencils?
30 pencils
Explain why estimating before measuring helps.
It helps choose the right tool/unit.
Jacob says a table is 13 paperclips long. About how long is it?
☐ About 1 foot
☐ About 1 inch
☐ About 3 inches
About 1 foot.