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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. - PowerPoint PPT Presentation

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  • EXAMPLE 1Multiply Decimals Using Mental Matha.0.05 1000

  • EXAMPLE 1Multiply Decimals Using Mental MathMove 3 places to the right.a.0.05 1000

  • EXAMPLE 1Multiply Decimals Using Mental MathMove 3 places to the right.a.0.05 1000= 0 0 5 0.

  • EXAMPLE 1Multiply Decimals Using Mental MathMove 3 places to the right.a.0.05 1000= 50= 0 0 5 0.

  • EXAMPLE 1Multiply Decimals Using Mental Mathb.95.38 0.0001Move 3 places to the right.a.0.05 1000= 50= 0 0 5 0.

  • EXAMPLE 1Multiply Decimals Using Mental Mathb.Move 4 places to the left.Move 3 places to the right.a.0.05 1000= 50= 0 0 5 0.95.38 0.0001

  • EXAMPLE 1Multiply Decimals Using Mental Mathb.Move 4 places to the left.Move 3 places to the right.a.0.05 1000= 50= 0 0 5 0.= .0 0 9 5 3 895.38 0.0001

  • EXAMPLE 1Multiply Decimals Using Mental Mathb.Move 4 places to the left.Move 3 places to the right.a.0.05 1000= 50= 0.009538= 0 0 5 0.= .0 0 9 5 3 895.38 0.0001

  • EXAMPLE 2The graph shows the number of vehicles that crossed bridges during 2000. How many vehicles crossed the Golden Gate Bridge?Multiply Decimals by Powers of TenBridges

  • EXAMPLE 2Multiply Decimals by Powers of TenThe graph shows the number of vehicles that crossed bridges during 2000. How many vehicles crossed the Golden Gate Bridge?Bridges

  • EXAMPLE 2Multiply Decimals by Powers of Ten4.25 10,000,000

  • EXAMPLE 2Multiply Decimals by Powers of Ten4.25 10,000,000Move 7 places to the right.

  • EXAMPLE 2Multiply Decimals by Powers of Ten4.25 10,000,000= 4 2 5 0 0 0 0 0 .Move 7 places to the right.

  • EXAMPLE 2Multiply Decimals by Powers of Ten4.25 10,000,000= 4 2 5 0 0 0 0 0 .Move 7 places to the right.= 42,500,000

  • EXAMPLE 2Multiply Decimals by Powers of Ten4.25 10,000,000= 4 2 5 0 0 0 0 0 .Move 7 places to the right.= 42,500,000In 2000, 42,500,000 vehicles crossed the Golden Gate Bridge.ANSWER

  • EXAMPLE 3Divide Decimals Using Mental Matha.508.3 10

  • EXAMPLE 3Divide Decimals Using Mental Matha.508.3 10Move 1 place to the left.

  • EXAMPLE 3Divide Decimals Using Mental Matha.508.3 10= 5 0 . 8 3Move 1 place to the left.

  • EXAMPLE 3Divide Decimals Using Mental Matha.508.3 10= 5 0 . 8 3Move 1 place to the left.= 50.83

  • EXAMPLE 3Divide Decimals Using Mental Matha.508.3 10= 5 0 . 8 3Move 1 place to the left.= 50.83b.508.3 0.01

  • EXAMPLE 3Divide Decimals Using Mental Matha.508.3 10= 5 0 . 8 3Move 1 place to the left.= 50.83b.Move 2 places to the right.508.3 0.01

  • EXAMPLE 3Divide Decimals Using Mental Matha.508.3 10= 5 0 . 8 3Move 1 place to the left.= 50.83b.= 5 0 8 3 0 .

    508.3 0.01Move 2 places to the right.

  • EXAMPLE 3Divide Decimals Using Mental Matha.508.3 10= 5 0 . 8 3Move 1 place to the left.= 50.83b.= 5 0 8 3 0 .

    = 50,830508.3 0.01Move 2 places to the right.

  • GUIDED PRACTICEfor Example 1,2 and 3

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000Move 3 places to the right.

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.Move 2 places to the left.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 1002. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100Move 2 places to the left.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 10002. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 1000Move 3 places to the left.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 1000= 0.509Move 3 places to the left.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 1000= 0.509Move 3 places to the left.5. 5 0.12. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 1000= 0.509Move 3 places to the left.5. 5 0.1Move 1 places to the right.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 1000= 0.509Move 3 places to the left.5. 5 0.1= 50Move 1 places to the right.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 1000= 0.509Move 3 places to the left.5. 5 0.1= 50Move 1 places to the right.6. 3.2 0.0012. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 1000= 0.509Move 3 places to the left.5. 5 0.1= 50Move 1 places to the right.6. 3.2 0.001Move 3 places to the right.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.1. 6.07 1000= 6070Move 3 places to the right.= 1.536Move 2 places to the left.3. 42.6 100= 0.426Move 2 places to the left.4. 509 1000= 0.509Move 3 places to the left.5. 5 0.1= 50Move 1 places to the right.6. 3.2 0.001= 3200Move 3 places to the right.2. 153.6 0.01

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000.Bridges7.

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.5.34 10,000,000Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000.Bridges7.

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.5.34 10,000,000Move 7 places to the right.Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000.Bridges7.

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.5.34 10,000,000= 53,400,000Move 7 places to the right.Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000.Bridges7.

  • GUIDED PRACTICEfor Example 1,2 and 3Find the product or quotient using mental math.5.34 10,000,000= 53,400,000Move 7 places to the right.ANSWERIn 2000, 53,400,000 vehicles crossed the George Washington Bridge.Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000.Bridges7.