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EXAMPLE 1. Multiply Decimals Using Mental Math. a. 0.05 1000. EXAMPLE 1. Multiply Decimals Using Mental Math. a. 0.05 1000. Move 3 places to the right. EXAMPLE 1. Multiply Decimals Using Mental Math. a. = 0 0 5 0. 0.05 1000. Move 3 places to the right. EXAMPLE 1.
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EXAMPLE 1 Multiply Decimals Using Mental Math a. 0.05 1000
EXAMPLE 1 Multiply Decimals Using Mental Math a. 0.05 1000 Move 3 places to the right.
EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right.
EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50
EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50 b. 95.38 0.0001
EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50 b. 95.38 0.0001 Move 4 places to the left.
EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50 b. = .0 0 9 5 3 8 95.38 0.0001 Move 4 places to the left.
EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50 b. = .0 0 9 5 3 8 95.38 0.0001 Move 4 places to the left. = 0.009538
EXAMPLE 2 Multiply Decimals by Powers of Ten Bridges The graph shows the number of vehicles that crossed bridges during 2000. How many vehicles crossed the Golden Gate Bridge?
EXAMPLE 2 Multiply Decimals by Powers of Ten Bridges The graph shows the number of vehicles that crossed bridges during 2000. How many vehicles crossed the Golden Gate Bridge?
EXAMPLE 2 Multiply Decimals by Powers of Ten 4.25 10,000,000
EXAMPLE 2 Multiply Decimals by Powers of Ten 4.25 10,000,000 Move 7 places to the right.
EXAMPLE 2 Multiply Decimals by Powers of Ten = 4 2 5 0 0 0 0 0 . 4.25 10,000,000 Move 7 places to the right.
EXAMPLE 2 Multiply Decimals by Powers of Ten = 4 2 5 0 0 0 0 0 . 4.25 10,000,000 Move 7 places to the right. = 42,500,000
EXAMPLE 2 Multiply Decimals by Powers of Ten = 4 2 5 0 0 0 0 0 . 4.25 10,000,000 Move 7 places to the right. = 42,500,000 ANSWER In 2000, 42,500,000 vehicles crossed the Golden Gate Bridge.
EXAMPLE 3 Divide Decimals Using Mental Math a. 508.3 10
EXAMPLE 3 Divide Decimals Using Mental Math a. 508.3 10 Move 1 place to the left.
EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left.
EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83
EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83 b. 508.3 0.01
EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83 b. 508.3 0.01 Move 2 places to the right.
EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83 b. = 5 0 8 3 0 . 508.3 0.01 Move 2 places to the right.
EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83 b. = 5 0 8 3 0 . 508.3 0.01 Move 2 places to the right. = 50,830
for Example 1,2 and 3 GUIDED PRACTICE
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 1. 6.07 1000
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 1. 6.07 1000 Move 3 places to the right.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. 2. 153.6 0.01
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. 2. 153.6 0.01 Move 2 places to the left.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. 3. 42.6 100
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. 3. 42.6 100 Move 2 places to the left.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. 4. 509 1000
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. 4. 509 1000 Move 3 places to the left.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. 5. 5 0.1
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. 5. 5 0.1 Move 1 places to the right.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. = 50 5. 5 0.1 Move 1 places to the right.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. = 50 5. 5 0.1 Move 1 places to the right. 6. 3.2 0.001
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. = 50 5. 5 0.1 Move 1 places to the right. 6. 3.2 0.001 Move 3 places to the right.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. = 50 5. 5 0.1 Move 1 places to the right. = 3200 6. 3.2 0.001 Move 3 places to the right.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000. 5.34 10,000,000
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000. 5.34 10,000,000 Move 7 places to the right.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000. = 53,400,000 5.34 10,000,000 Move 7 places to the right.
for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000. = 53,400,000 5.34 10,000,000 Move 7 places to the right. ANSWER In 2000, 53,400,000 vehicles crossed the George Washington Bridge.