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Writing Decimals

Writing Decimals. Write the name of each place value below:. hundred thousands. hundred thousandths. ten thousandths. ten thousands. hundredths. millionths. thousandths. thousands. hundreds. millions. tens. ones. tenths. Rounding Decimals.

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Writing Decimals

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  1. Writing Decimals Write the name of each place value below: hundred thousands hundred thousandths ten thousandths ten thousands hundredths millionths thousandths thousands hundreds millions tens ones tenths

  2. Rounding Decimals Round forty seven and twenty eight thousandths to the nearest hundredth. 47.028 Write it in decimal form. Find the hundredths place. Now, look at the digit to the right. If it’s 4 or below, let the 2 go. If it’s 5 or above, give the 2 a shove (up to 3) Write the new number. 47.03

  3. Comparing Decimals Compare 3.24 and 3.2384 with <, >, or =. 3.24 00 Stack the numbers on top of each other with the decimal places lined up. 3.2384 Add zeros to balance the numbers. Now, start on the left, and compare each digit until you find the greater value. > Write the expression with <, >, or =. 3.24 3.2384

  4. Estimating/Finding Sums and Difference Find the sum of 140.25 and 9.9047. Estimate the answer. How? 140 + 10 150 Round each one to the nearest whole number, then add. Stack the numbers on top of each other with the decimal places lined up. 140.25 00 + 9.9047 Add zeros to balance the numbers. 150.1547 Add like you’ve always added. Is it close to your estimate?

  5. Adding/Subtracting/Multiplying/Dividing Decimals http://www.virtualnerd.com/VN/playlists/view/613

  6. Name: • Solving Practical Problems with Decimals • A pail holds 5.2 litersof water. A bottle holds 3.9 litersless water than the pail. What is the volume of water in the bottle? • A computer processes information in nanoseconds. A nanosecond is one billionth of a second. Write this number as a decimal. • A full tank of gasoline costs $17.45. If the car has a 12-gallon tank, approximately how much does a gallon of gasoline cost? • A very large flag was made with a length of about 361.7 meters and a width of about 27.7 meters. Find the area of the flag to the nearest square meter. • Daniel has $945.24 to spend on stock. He selects a stock that has a current price of $27.65 per share. How many shares of stock can Daniel purchase? Round to the nearest hundredth. • Ellen wanted to buy the following items: A DVD player for $49.95, a DVD holder for $19.95 and a personal stereo for $21.95. Does Ellen have enough money to buy all three items if she has $90 with her? • Five swimmers are entered into a competition. Four of the swimmers have had their turns. Their scores are 9.8 s, 9.75 s, 9.79 s, and 9.81 s. What score must the last swimmer get in order to win the competition? • 8. If a 10-foot piece of electrical tape has 0.037 feet cut from it, what is the new length of the tape?. • If you work 7.5 hours a day for $6.74 per hour, how much do you make each day? • Maria has $9.09. She wants to spend all her money on peaches. If peaches are on sale for $0.45 per pound, how many pounds of peaches can she buy? • Melissa purchased $39.46 in groceries at a store. The cashier gave her $1.46 in change from a $50 bill. Melissa gave the cashier an angry look. What did the cashier do wrong? • Susan has 4 times as much money as her sister. If Susan has $10, how much money does her sister have? • The length of a ribbon is 1.28 m. The length of a rope is 2.74 m longer than the ribbon. What is the length of the rope? • The mass of a jar of sugar is 1.9 kg. What is the total mass of 4 such jars of sugar? • The readings on the dial were 3.4, 5, 2.75, and 3.61. What is the average of the readings? • The sloth is commonly referred to as the "slowest mammal on Earth." Its top speed on the ground is about 0.2 mile per hour. What is the farthest (in miles) a sloth might go in 0.3 hour? • There are 1.6 kilometers in a mile. How many miles are there in 98.7 kilometers? • To make a miniature ice cream truck, you need tires with a diameter between 1.465 cm and 1.472 cm. Will a tire that is 1.4691 cm in diameter work? Explain why or why not. • Tony has 5.8 kg of coffee. He will put them in 8 bags. How much will be in each bag? • T-shirts are on sale at 3 for $40. What is the cost of one t-shirt? • What is the combined thickness of these five shims: 0.008, 0.125, 0.15, 0.185, and 0.005 cm? • You and your two best friends make $48.81 gardening in the neighborhood over the weekend. If you divide the money evenly between you, how much will each of you have made?

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