Overview
At this point the idea of mixed unit shows up in a varied of contexts. Students have become accustomed to thinking of 250 as the mixed units of 2 hundreds 5 tens. Mixed units are also used in the context of 2 hr 5 min, $2.50, 2 km 5 m, 2' 5", and 2 5/8 (hours and minutes, dollars and cents, kilometers and meters, feet and inches, ones and eighths). In this unit students focus on considering the connections and similarities between the following equalities:
2 thousands 437 ones = 2,437 ones
2 kilometers 437 meters = 2,437 meters
2 kilograms 437 grams = 2,437 grams
2 liters 437 milliliters = 2,437 milliliters
In Topic A, students review place value concepts while building fluency with decomposing, or converting from larger to smaller units. They learn the relative sixes of measurement units, building off prior knowledge of grams and kilograms from 2nd and 3rd grade. Students reason by choosing to convert between mixed and single units before or after the computation. Connecting their familiarity with both metric units and place value, the module moves swiftly through each unit of conversion, spending only one day on each type.
In Topic B, students solidify their understanding of the relationship between metric units and the place value chart and apply unit conversions to solve and reason about multi-step word problems. A students solve word problems by adding and subtracting metric units, they ability to reason in parts and wholes is taken to the next level. Tape diagrams and number lines serve as models throughout the module to support the application of the standard algorithm to word problems.
2 thousands 437 ones = 2,437 ones
2 kilometers 437 meters = 2,437 meters
2 kilograms 437 grams = 2,437 grams
2 liters 437 milliliters = 2,437 milliliters
In Topic A, students review place value concepts while building fluency with decomposing, or converting from larger to smaller units. They learn the relative sixes of measurement units, building off prior knowledge of grams and kilograms from 2nd and 3rd grade. Students reason by choosing to convert between mixed and single units before or after the computation. Connecting their familiarity with both metric units and place value, the module moves swiftly through each unit of conversion, spending only one day on each type.
In Topic B, students solidify their understanding of the relationship between metric units and the place value chart and apply unit conversions to solve and reason about multi-step word problems. A students solve word problems by adding and subtracting metric units, they ability to reason in parts and wholes is taken to the next level. Tape diagrams and number lines serve as models throughout the module to support the application of the standard algorithm to word problems.
* End-of-Module Assessment after Topic B.
Vocabulary Terms
Covert - express a measurement in a different unit, rename units
Kilometer - km, a unit of measure for length
Mass - the measure of the amount of matter in an object
Milliliter - mL, a unit of measure for liquid volume
Capacity - the maximum amount that something can contain
Equivalent - equal
Kilometer - km, a unit of measure for length
Mass - the measure of the amount of matter in an object
Milliliter - mL, a unit of measure for liquid volume
Capacity - the maximum amount that something can contain
Equivalent - equal