homework helper lesson 8 estimate products

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McGraw Hill My Math Grade 5 Chapter 2 Lesson 8 Answer Key Estimate Products

All the solutions provided in McGraw Hill Math Grade 5 Answer Key PDF Chapter 2 Lesson 8 Estimate Products  will give you a clear idea of the concepts.

McGraw-Hill My Math Grade 5 Answer Key Chapter 2 Lesson 8 Estimate Products

Math in My World

Circle whether the estimates were all less than or greater than the actual product. less than greater than the estimate is 920 is less than the actual product. the estimate is 900 is less than the actual product.

Guided Practice

Estimate by rounding or using compatible numbers. Show how you estimated.

Independent Practice

Estimate by rounding. Show how you estimated.

Question 6. 61 × 68 ≈ ___ Answer: 4148 The estimation by rounding the answer is 4150.

Explanation: First, start with units first. So multiply 8 by 1. Then move on to the tens digit. So multiply 8 by 6. Continue the same process with digit 6. By multiplying both multiplicand 61 and multiplier 68, we get the value 4148.

Question 7. 79 × 56 ≈ ___ Answer: 4424 The estimation by rounding the answer is 4420.

Question 8. 392 × 46 ≈ ___ Answer: 18032 The estimation by rounding the answer is 18030.

Estimate by using compatible numbers. Show how you estimated.

Question 12. 33 × 84 ≈ ___ Answer: 2772.

Question 13. 450 × 21 ≈ ___ Answer: 9450

Question 14. 729 × 42 ≈ ___ Answer: 30618

Problem Solving

Explanation: Given The pounds of apples are 514 + 487 + 349 + 421 + 392 = 2163. The estimated answer is 2160.

Question 16. In one week, a campground rented 18 cabins at $225 each. About how much did they collect in rent altogether? Show how you estimated. Answer: $4050

Explanation: In one week, a campground rented 18 cabins at $225 each Find 18 × 225 4050 The rent they collected altogether is $4050.

Question 17. The average weight for a guinea pig is 2 pounds. The average weight for a pot belly pig is 45 times greater than the guinea pig. About how much does an average pot belly pig weigh? Show how you estimated. Answer: 90 pounds.

Explanation: Given, The average weight for a guinea pig is 2 pounds. The average weight for a pot belly pig is 45 times greater than the guinea pig. So, 2 × 45 = 90 pounds.

Hot Problems

Explanation: Let us assume 34 and 17 are two whole numbers from the given digits. If we multiply 34 and 17 then the answer is 34 × 17 = 578. If we are rounding up to the nearest hundreds we will get 600. If we are rounding up the whole numbers the estimation of 34 to the nearest ten is 30 and 17 to the nearest ten is 20 Then the product is 30 × 20 = 600 Hence both the ways 34 and 17 are for the estimated product to be 600.

Question 19. ? Building on the Essential Question When is the estimation of products a useful tool? Answer: When the numbers we have are either bigger or smaller and when we buy multiple items which have the same price.

McGraw Hill My Math Grade 5 Chapter 2 Lesson 8 My Homework Answer Key

Question 4. For a school assembly, students sit in chairs that are arranged in 53 rows. There are 12 chairs in each row. About how many students can be seated? Show how you estimated. Answer: 636

Explanation: The given question is students sit in chairs that are arranged in 53 rows. There are 12 chairs in each row. 53 × 12 = 636 There are 636 students who would be seated

Question 5. Klara bought a dozen bags of bird food for $27. Use compatible numbers to find the approximate cost of six dozen bags of bird food. Show how you estimated. Answer: $160 would cost for six dozen bags of bird food.

Explanation: Klara bought a dozen bags of bird food for $27 12 dozen = $27 of bird food = 1 bag 24 dozens = $54 of bird food = 2 bags 36 dozens = $81 = 3 bags 48 dozens = $108 = 4 bags 60 dozens = $135 = 5 bags 72 dozens = $162 = 6 bags Hence $160 would cost for six dozen bags of bird food.

Question 6. Mathematical PRACTICE 3 Find the Error Rico is estimating 139 × 18. Find his mistake and correct it. 100 × 10 = 1,000 Answer: 2800

Explanation: The given question is Rico is estimating 139 × 18. We are here to find the mistake in the given question. Rico has rounded down 139 to 100 and 18 to 10 Hence 140 × 20 2800

Vocabulary Check

Fill in the blank with the correct term or number to complete the sentence.

Question 7. Compatible numbers are numbers in a problem that are easy to compute ____. Answer: Add, subtract, multiply or divide mentally.

Explanation: Compatible numbers are numbers in a problem that is easy to compute Add, subtract, multiply or divide mentally.

Test Practice

Question 8. On a cross-country vacation, Maria filled her 14-gallon gas tank eleven times. Which is the best estimate of how many gallons of gas she put in the tank altogether? A. 75 gallons B. 150 gallons C. 200 gallons D. 225 gallons Answer: 150 gallons

Explanation: Maria filled her 14-gallon gas tank eleven times 14 × 11 154 It is rounded to 150 The best estimate of gas she put in the tank altogether is 150 gallons.

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Estimate Products

Related Topics: More Lessons for Grade 6 Math Math Worksheets

Examples, solutions, videos, worksheets, stories, and songs to help Grade 6 students learn how to estimate products by clustering and rounding.

How to estimate products using rounding?

• Round to the greatest place value digit.
• Multiply the non-zero digits.
• Write the number of zeroes in the rounded numbers on the end of the answer.

Round - then estimate the product Learn to estimate greater products using rounding. Example: Round, then estimate the Product: 868 × 13 732 × 17 9,999 &times 777

Estimating Products Find an approximate value to the exact answer.

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Course: 4th grade   >   Unit 3

• Estimating with multiplication

Estimate products (1-digit times 2, 3, and 4-digit)

• (Choice A)   200 ‍   A 200 ‍  
• (Choice B)   2,000 ‍   B 2,000 ‍  
• (Choice C)   3,000 ‍   C 3,000 ‍  
• (Choice D)   4,000 ‍   D 4,000 ‍  

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McGraw-Hill My Math Grade 5 Volume 1

Textbook: mcgraw-hill my math grade 5 volume 1 isbn: 9780021150243.

Use the table below to find videos, mobile apps, worksheets and lessons that supplement McGraw-Hill My Math Grade 5 Volume 1 book.

Chapter 1: Place Value

Lesson 1: place value through millions, lesson 2: compare and order whole numbers through millions, lesson 3: hands on: model fractions and decimals, lesson 4: represent decimals, lesson 5: hands on: understand place value, lesson 6: place value through thousandths, lesson 7: compare decimals, lesson 8: order whole numbers and decimals, chapter 2: multiply whole numbers, lesson 1: prime factorization, lesson 2: hands on: prime factorization patterns, lesson 3: powers and exponents, lesson 4: multiplication patterns, lesson 5: hands on: use partial products and the distributive property, lesson 6: the distributive property, lesson 7: estimate products, lesson 8: multiply by one-digit numbers, lesson 9: multiply by two-digit numbers, chapter 3: divide by a one-digit divisor, lesson 1: relate division to multiplication, lesson 2: hands on: division models, lesson 3: two-digit dividends, lesson 4: division patterns, lesson 5: estimate quotients, lesson 6: hands on: division models with greater numbers, lesson 7: hands on: distributive property and partial quotients, lesson 8: divide three- and four-digit dividends, lesson 9: place the first digit, lesson 10: quotients with zeros, lesson 11: hands on: use models to interpret the remainder, lesson 12: interpret the remainder, chapter 4: divide by a two-digit divisor, lesson 1: estimate quotients, lesson 2: hands on: divide using base-ten blocks, lesson 3: divide by a two-digit divisor, lesson 4: adjust quotients, lesson 5: divide greater numbers, chapter 5: add and subtract decimals, lesson 1: round decimals, lesson 2: estimate sums and differences, lesson 3: hands on: add decimals using base-ten blocks, lesson 4: hands on: add decimals using models, lesson 5: add decimals, lesson 6: addition properties, lesson 7: hands on: subtract decimals using base-ten blocks, lesson 8: hands on: subtract decimals using models, lesson 9: subtract decimals, chapter 6: multiply and divide decimals, lesson 1: estimate products of whole numbers and decimals, lesson 2: hands on: use models to multiply, lesson 3: multiply decimals by whole numbers, lesson 4: hands on: use models to multiply decimals, lesson 5: multiply decimals, lesson 6: multiply decimals by powers of ten, lesson 7: multiplication properties, lesson 8: estimate quotients of decimals, lesson 9: hands on: divide decimals, lesson 10: divide decimals by whole numbers, lesson 11: hands on: use models to divide decimals, lesson 12: divide decimals, lesson 13: divide decimals by powers of ten, chapter 7: expressions and patterns, lesson 1: hands on: numerical expressions, lesson 2: order of operations, lesson 3: write numerical expressions, lesson 4: hands on: generate patterns, lesson 5: patterns, lesson 6: ordered pairs, lesson 7: graph patterns.

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Home > CC3 > Chapter 8 > Lesson 8.2.1 > Problem 8-48

Calculate the following products without using a calculator.

For help on multiplying numbers by powers of 10 and moving the decimal point, see problem 8-40.

Two of the table's solutions are provided below. Complete the rest of the table.

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