3.10 · Part II
Supported Application · Guided Entry to Today's Problem
Convert Measurement Units · Conversion Factor
- Write the given measurement as a fraction over 1
- Multiply by conversion ratios arranged so unwanted units cancel diagonally
- Multiply numerators, multiply denominators, and simplify the remaining unit
- Convert Measurement Units (Convertir unidades de medida) — Rename a measurement in a different unit without changing its amount.
- Conversion Factor (Factor de conversión) — A ratio that helps you change one unit into another.
- Unit (Unidad) — A standard amount used to measure, like an inch or a liter.
- Equivalent (Equivalente) — Having the same value, just in different units.
- Ratio (Razón) — A way to compare two amounts, like 3 to 2.
- Customary units (Unidades usuales (sistema inglés)) — The U.S. way of measuring, like inches, feet, and pounds.
- A common mistake in Convert Measurement Units is applying the conversion factor in the wrong direction — for example, converting 4 feet to inches by dividing (4 ÷ 12 = 0.33 inches) instead of multiplying (4 × 12 = 48 inches), or converting 80 ounces to pounds by multiplying (80 × 16 = 1,280 pounds) instead of dividing (80 ÷ 16 = 5 pounds). Before you answer, ask: am I changing to a SMALLER unit (there will be MORE of them, so multiply) or a BIGGER unit (there will be FEWER of them, so divide)?
-
1 MULTIPLE CHOICE
Convert 24 inches to feet.
- A2 feet
- B3 feet
- C12 feet
- D24 feet
✏️ Workspace & Solution Steps -
2 MULTIPLE CHOICE
(Lesson 3.4) A ratio table shows (2, 6), (4, 12), and (6, 18). Which ordered pair comes next if the pattern continues?
- A(8, 24)
- B(7, 20)
- C(8, 22)
- D(10, 24)
✏️ Workspace & Solution Steps -
3 MULTIPLE CHOICE
(Lesson 3.4) When you graph equivalent ratios, the points will always form what shape?
- AA straight line through the origin
- BA curved line
- CA zigzag
- DA circle
✏️ Workspace & Solution Steps
Writing Task: Justify why your mathematical solution is accurate and complete.
3.10 · Part II
On-Level Application · Standard Rigor
Convert Measurement Units · Conversion Factor
- Write the given measurement as a fraction over 1
- Multiply by conversion ratios arranged so unwanted units cancel diagonally
- Multiply numerators, multiply denominators, and simplify the remaining unit
- Convert Measurement Units (Convertir unidades de medida) — Rename a measurement in a different unit without changing its amount.
- Conversion Factor (Factor de conversión) — A ratio that helps you change one unit into another.
- Unit (Unidad) — A standard amount used to measure, like an inch or a liter.
- Equivalent (Equivalente) — Having the same value, just in different units.
- Ratio (Razón) — A way to compare two amounts, like 3 to 2.
- Customary units (Unidades usuales (sistema inglés)) — The U.S. way of measuring, like inches, feet, and pounds.
- A common mistake in Convert Measurement Units is applying the conversion factor in the wrong direction — for example, converting 4 feet to inches by dividing (4 ÷ 12 = 0.33 inches) instead of multiplying (4 × 12 = 48 inches), or converting 80 ounces to pounds by multiplying (80 × 16 = 1,280 pounds) instead of dividing (80 ÷ 16 = 5 pounds). Before you answer, ask: am I changing to a SMALLER unit (there will be MORE of them, so multiply) or a BIGGER unit (there will be FEWER of them, so divide)?
-
1 MULTIPLE CHOICE
A shelf is 30 inches long. How many feet and inches is that?
- A2 feet 6 inches
- B3 feet 0 inches
- C2 feet 8 inches
- D1 foot 18 inches
✏️ Workspace & Solution Steps -
2 MULTIPLE CHOICE
Leg 1: The joystick rod is 3 feet long, but the parts catalog lists it in inches. How many inches is that? (1 ft = 12 in)
- A36 inches
- B15 inches
- C30 inches
- D33 inches
✏️ Workspace & Solution Steps -
3 MULTIPLE CHOICE
Leg 2: A power cable on the cabinet plan measures 2.5 kilometers across the whole arcade network. How many meters is that? (1 km = 1,000 m)
- A2,500 meters
- B250 meters
- C25 meters
- D25,000 meters
✏️ Workspace & Solution Steps
Writing Task: Justify why your mathematical solution is accurate and complete.
3.10 · Part II
Extension & Non-Routine Application
Convert Measurement Units · Conversion Factor
- Write the given measurement as a fraction over 1
- Multiply by conversion ratios arranged so unwanted units cancel diagonally
- Multiply numerators, multiply denominators, and simplify the remaining unit
- Convert Measurement Units (Convertir unidades de medida) — Rename a measurement in a different unit without changing its amount.
- Conversion Factor (Factor de conversión) — A ratio that helps you change one unit into another.
- Unit (Unidad) — A standard amount used to measure, like an inch or a liter.
- Equivalent (Equivalente) — Having the same value, just in different units.
- Ratio (Razón) — A way to compare two amounts, like 3 to 2.
- Customary units (Unidades usuales (sistema inglés)) — The U.S. way of measuring, like inches, feet, and pounds.
- A common mistake in Convert Measurement Units is applying the conversion factor in the wrong direction — for example, converting 4 feet to inches by dividing (4 ÷ 12 = 0.33 inches) instead of multiplying (4 × 12 = 48 inches), or converting 80 ounces to pounds by multiplying (80 × 16 = 1,280 pounds) instead of dividing (80 ÷ 16 = 5 pounds). Before you answer, ask: am I changing to a SMALLER unit (there will be MORE of them, so multiply) or a BIGGER unit (there will be FEWER of them, so divide)?
-
1 MULTIPLE CHOICE
Convert 3 hours to seconds using 1 hour = 60 minutes and 1 minute = 60 seconds.
- A10,800 seconds
- B180 seconds
- C3,600 seconds
- D120 seconds
✏️ Workspace & Solution Steps
Writing Task: Justify why your mathematical solution is accurate and complete.