Mastery Key

Review Marathon • Final Verified Version

1: Measurement (CM)

1aA (10 cm)

1bB (8 cm)

1cA (13 cm)

2a: Correct. Inches are a larger unit than centimeters. Since the units are larger, fewer of them are needed to cover the same length.

2b: Correct. A yardstick (36") is larger than a ruler (12"). Larger tools result in a smaller final measurement count.

2c: Correct. Millimeters are smaller than centimeters, so more of them are needed to measure the same distance.

3aB (3 in)5 - 2 = 3

3bC (3 in)6 - 3 = 3

3cC (3 in)4 - 1 = 3

4aC

Simon counted the 8 points (numbers) instead of the 7 spaces (intervals).

4bA

Sarah counted the numbers 30-38 (9 points) instead of the 8 jumps.

5a19

5b17

5c17

6a (Charisse)

Part A: A (9 cm)Part B: A (5 cm)

Longest: Spoon. Diff (Pencil vs Block): 8 - 3 = 5.

6b (Malik)

Part A: A (12 cm)Part B: A (4 cm)

Longest: Marker. Diff (Marker vs Car): 12 - 8 = 4.

6c (Amara)

Part A: A (14 cm)Part B: A (3 cm)

Longest: Phone. Diff (Phone vs Remote): 14 - 11 = 3.