Question

11.5 measure objects using different length units
learning target: measure the length of an object in two different measurement units.

1. would you use more centimeters, more meters, or more inches to measure the length of a pencil?

centimeters meters inches

1. would you use fewer centimeters, fewer meters, or fewer feet to measure the length of a desk?

centimeters meters feet
order the lengths from shortest to longest.

1. 15 feet 15 centimeters 15 inches

______, ____, ______

1. 5 meters 5 centimeters 5 feet

______, ____, ______

1. would you use fewer feet or fewer meters to measure the length of a wildbeest? explain.

________
________

Explanation:

Question 9

Step1: Recall unit sizes

1 meter = 100 centimeters, 1 inch ≈ 2.54 centimeters. A pencil is small. Meters are large (1m = 100cm), inches ≈2.54cm. So to measure a pencil, you need more centimeters (since cm is smaller, more units needed) than meters (meter is too big, few units) or inches (inch is bigger than cm, so fewer inches than cm for same length). Wait, no: Wait, the question is "more centimeters, more meters, or more inches". So for a pencil (say 15 cm long). In meters: 0.15 meters (so very few, almost 0). In inches: 15 cm / 2.54 ≈ 5.9 inches. So centimeters: 15, inches: ~6, meters: 0.15. So you use more centimeters (since 15 > 6 > 0.15). So the answer is centimeters.

Step1: Recall unit sizes

1 meter = 100 cm, 1 foot ≈ 30.48 cm. A desk is, say, 1 meter (100 cm) or 3 feet (≈91.44 cm). So for a desk, let's take length as 100 cm. In centimeters: 100, in meters: 1, in feet: 100 / 30.48 ≈ 3.28. So "fewer" – so which unit has fewer? Meters: 1, feet: ~3, centimeters: 100. So fewer meters? Wait no: Wait the question is "fewer centimeters, fewer meters, or fewer feet". Wait, no: Wait, when measuring, a larger unit means fewer units. So meter is larger than foot (1m ≈3.28ft) and larger than cm. So for a desk, length in meters: if desk is 1.5 meters, that's 1.5 meters. In feet: 1.5 3.28 ≈4.92 feet. In centimeters: 150 cm. So to measure the desk, which unit gives fewer? Meters: 1.5, feet: ~5, centimeters: 150. So fewer meters? Wait no, wait 1 meter is 3.28 feet, so a meter is longer than a foot. So for the same length, the number of meters is less than the number of feet. So if the desk is, say, 2 meters (200 cm), in feet: 2 3.28 ≈6.56 feet. So meters: 2, feet: ~6.56, centimeters: 200. So "fewer" – so fewer meters? Wait the options are "fewer centimeters, fewer meters, or fewer feet". Wait, no: Wait, the question is "Would you use fewer centimeters, fewer meters, or fewer feet to measure the length of a desk?". So the unit with the largest size will have the fewest units. Meters are larger than feet (1m > 1ft) and larger than cm. So meters: fewest units. So the answer is meters? Wait no, wait 1 foot is about 30 cm, 1 meter is 100 cm. So a desk is, say, 120 cm. In meters: 1.2, in feet: 120 / 30.48 ≈3.94, in centimeters: 120. So 1.2 (meters) < 3.94 (feet) < 120 (cm). So you use fewer meters (since 1.2 is less than 3.94 and 120). Wait, but the options are "fewer centimeters, fewer meters, or fewer feet". So the answer is fewer meters? Wait no, wait 1 meter is 3.28 feet, so a meter is longer than a foot. So for a desk, length in meters is less than in feet. So yes, fewer meters. Wait, but let's check: if desk is 2 meters (200 cm). In feet: 2 * 3.28 ≈6.56. So meters: 2, feet: ~6.56. So 2 < 6.56, so fewer meters. So the answer is meters? Wait no, wait the question is "fewer" – so which unit requires the least number? Meters: since meter is the largest unit here (meter > foot > cm). So largest unit → fewest units. So meters.

Step1: Convert all to same unit (cm)

15 feet: 1 foot = 30.48 cm, so 15 * 30.48 = 457.2 cm
15 centimeters: 15 cm
15 inches: 1 inch = 2.54 cm, so 15 * 2.54 = 38.1 cm

Step2: Order from shortest to longest

15 cm (shortest), 15 inches (38.1 cm), 15 feet (457.2 cm)

Answer:

centimeters

Question 10