1. Do Now 11/16/11 Take out your HW from last night. Take out your HW from last night. Text p. 106, #10-44 evens Text p. 106, #10-44 evens Copy HW in your planner. Copy HW in your planner. Text p. 110, #14-34 evens Text p. 110, #14-34 evens Quiz sections 3-1 to 3-3 Friday Quiz sections 3-1 to 3-3 Friday In your journal, divide the following numbers. Describe any patterns you see in the 4 problems. In your journal, divide the following numbers. Describe any patterns you see in the 4 problems. 900 ÷ 300 90 ÷ 30 9 ÷ 3 0.9 ÷ 0.3

2. Homework Text p. 106, #10-44 evens 10) 4.8 10) 4.8 12) -8.1 12) -8.1 14) 29.4 14) 29.4 16) 90.73 16) 90.73 18) 7.68 18) 7.68 20) 24.38 20) 24.38 22) -0.1542 22) -0.1542 24) -40.945 24) -40.945 26) 284.4 km 26) 284.4 km 28) -19.68 28) -19.68 30) 16.6 30) 16.6 32) -0.0876 32) -0.0876 34) -488.85 34) -488.85 36) 30.495 36) 30.495 38) -0.7728 38) -0.7728 40) $319.63 40) $319.63 42) a. yes 42) a. yes b. about 42 million people b. about 42 million people 44) 21.5124 44) 21.5124

3. Objective SWBAT divide decimals SWBAT divide decimals

4. Section 3-3 “Dividing Decimals” By multiplying both numbers by the same power of ten, you can make the divisor an integer. Dividing by an integer is much easier than dividing by a decimal. How do you divide two decimal numbers 0.6 ÷ 0.3 0.3 0.6 divisor or 3 6 Multiply both numbers by 10 2

5. Find the quotient of 0.246 ÷ 0.03 8 24 0 6 2 6 Finished. 24 6 3 Move the decimal point straight up, then divide as you normally would. 0.03 0.246 3 24.6 Multiply both numbers by 100 to make the divisor an integer

6. Find the quotient of 7.75 ÷ 1.25 6 750 25 2 250 Finished. 775125 Move the decimal point straight up, then divide as you normally would. 1.25 7.75 125 775 Multiply both numbers by 100 to make the divisor an integer 0

7. “Dividing Integers” Rule #1 The quotient of two integers with the same sign is always POSITIVE! 8 ÷ 2 = 4 -18 ÷ (-3) = 6 Rule #2 The quotient of two integers with different signs is always NEGATIVE! -6 ÷ 3 = -2 28 ÷ (-4) = -7 Remember this?

8. Negative or Positive? Without solving the problem, decide whether the quotient will be positive, negative, or zero. Then estimate the answer to the nearest integer. Without solving the problem, decide whether the quotient will be positive, negative, or zero. Then estimate the answer to the nearest integer. -8.2 ÷ (-4.36) positive -23.3 ÷ 11.76 negative -3.3 ÷ 3.3 negative -17.9 ÷ (-6.02) positive

9. Find the quotient of -11.2 ÷ 0.8 1 8 3 4 32 Finished 118 0.8 11.2 8 112 Multiply both numbers by 10 to make the divisor an integer 2 The quotient of two integers with different signs is always NEGATIVE! -.

10. Find the quotient of -0.875 ÷ (-0.25) 3 75 12 5 125 Finished.8725 Move the decimal point straight up, then divide as you normally would. 0.25 0.875 25 87.5 Multiply both numbers by 100 to make the divisor an integer 5 The quotient of two integers with the same sign is always POSITIVE!

11. Find the quotient of -9 ÷ 1.25 7 875 25 2 250 Finished.900125 Move the decimal point straight up, then divide as you normally would. 1.25 9.00 125 900 Multiply both numbers by 100 to make the divisor an integer 0 The quotient of two integers with different signs is always NEGATIVE! -

12. “Real-Life” If Sandy and her family used 14.95 gallons of gas to drive 358.8 miles, how many miles per gallon did the car get? The car got 24 miles per gallon 14.95 358.8 1495 35880 Multiply both numbers by 100 to make the divisor an integer 24

13. 24 Homework Text p. 110, #14-34 evens