Lesson: Bridge Method

The Bridge Method a method of converting units using cancellation The Bridge Method to use the bridge method... to use the bridge method... you have to have... to use the bridge method... you have to have... Unit Conversion Factors to use the bridge method... you have to have... Unit Conversion Factors Like these 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft You also have to have something to be converted 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Like this You also have to have something to be converted 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft Conversion problem ? 5 ft = _____ in Which is which? Unit conversion Factors ? 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 1. Draw the bridge 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 1. Draw the bridge the bridge will look like a 'plus' sign 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 1. Draw the bridge the bridge will look like a 'plus' sign Like this 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 2. Write the given information in the bridge 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 2. Write the given information in the bridge 5 ft always put it in the top left Right here 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 3. Find the unit conversion factor you need 5 ft 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 3. Find the unit conversion factor you need 5 ft you need one that has the given unit 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 3. Find the unit conversion factor you need 5 ft you need one that has the given unit the given unit is feet 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 3. Find the unit conversion factor you need 5 ft you need one that has the given unit there are 2 unit conversion factor with feet 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 3. Find the unit conversion factor you need 5 ft you need one that has the given unit but since we are converting to inches we will use the one with inches 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge 5 ft 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft The factor will be written in the second column 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft it can either be written like this 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft 12 in 1 ft it can either be written like this 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft 12 in 1 ft or like this 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft 1 ft 12 in or like this 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft 1 ft 12 in but the units must cancel 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft 1 ft 12 in but the units must cancel 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft 1 ft 12 in but the units must cancel 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft Since feet is in the top 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge be sure that the units cancel 5 ft 1 ft 12 in but the units must cancel 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 4. Write the unit conversion factor in the bridge Feet must also be in the bottom be sure that the units cancel 5 ft 1 ft 12 in but the units must cancel 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 5. Cancel the units 5 ft 1 ft 12 in 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 5. Cancel the units 5 ft 1 ft 12 in 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 5. Cancel the units 5 ft 1 ft 12 in 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method 6. Then do that math 5 ft 1 ft 12 in 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method Multiply numbers in the top, divide bottom numbers 6. Then do that math 5 ft 1 ft 12 in 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method Multiply numbers in the top, divide bottom numbers 6. Then do that math 5 ft 1 ft 12 in 5 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method Multiply numbers in the top, divide bottom numbers 6. Then do that math 5 ft 1 ft 12 in 5 x 12 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method Multiply numbers in the top, divide bottom numbers 6. Then do that math 5 ft 1 ft 12 in 5 x 12 ÷ 1 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method Multiply numbers in the top, divide bottom numbers 6. Then do that math 5 ft 1 ft 12 in 5 x 12 ÷ 1 = 60 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = _____ in Let's go through the steps of the bridge method The answer is 60! 5 ft 1 ft 12 in 5 x 12 ÷ 1 = 60 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 5 ft = 60 in Let's go through the steps of the bridge method The answer is 60! 5 ft 1 ft 12 in 5 x 12 ÷ 1 = 60 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft Let's try another one!!! 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 1. Draw bridge 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 1. Draw bridge 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 1. Draw bridge 2. Write problem 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 in 1. Draw bridge 2. Write problem 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 in 1. Draw bridge 2. Write problem 3. Find conversion 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 in 1. Draw bridge 2. Write problem 3. Find conversion 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 in 1. Draw bridge 2. Write problem 3. Find conversion 4. Write conversion 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 in 12 in 1 ft 1. Draw bridge 2. Write problem 3. Find conversion 4. Write conversion 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 in 12 in 1 ft 1. Draw bridge 2. Write problem 3. Find conversion 4. Write conversion 5. Cancel units 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 in 12 in 1 ft 1. Draw bridge 2. Write problem 3. Find conversion 4. Write conversion 5. Cancel units 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 in 12 in 1 ft 1. Draw bridge 2. Write problem 3. Find conversion 4. Write conversion 5. Cancel units 6. Do math 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft 30 in = _____ ft 30 x 1 ÷ 12 = 2.5 30 in 12 in 1 ft 1. Draw bridge 2. Write problem 3. Find conversion 4. Write conversion 5. Cancel units 6. Do math 1 ft = 12 in 3 ft = 1 yd 1 mi = 5,280 ft What are the steps to the bridge method What are the steps to the bridge method 1. 2. 3. 4. 5. 6. 7. Cancel Units ? Find Conversion ? Write Conversion ? Draw Bridge ? Write Problem ? Do Math ? 2.3 ft = ? in 2.3 ft ? 12 in ? 1 ft ? 0.78 mi = ? km 0.78 mi ? 1.61 km ? 1 mi ? 17 in = ? mm 17 in ? 2.54 cm ? 1 in ? 10 mm ? 1 cm ? 200 mm = ? cm 200 mm ? 1 cm ? 10 mm ? 30 in = ? yd 30 in ? 1 ft ? 12 in ? 1 yd ? 3 ft ? 2500 mm = ? km 2500mm ? 1000 mm ? 1 m ? 1 km ? 1000 m ? |

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