2-min Fluency Warm-up — Solve in your head.
7 + 5 =
12 − 4 =
9 + 6 =
15 − 8 =
Line up the 0 end of the ruler with the start of the object. Read the number where the object ends. That is the length!
Watch out! If the object does not start at 0, count the inches it covers instead of just reading the end number.
Measure each line with your inch ruler. Line up the 0!
Number Talk — Explain WITHOUT measuring.
Look at lines A and D above. Which is longer? How can you tell just by looking?
My thinking:
A pencil is 7 inches. A crayon is 4 inches. About how many inches longer is the pencil? Explain how you know.
My thinking:
Challenge — Find 2 real objects at home. Measure each with a ruler.
Object 1:
Length: inches
Object 2:
Length: inches
Which object was longer?