# Multiplying with Estimation and Rounding Worksheet

Instructions: Solve the following problems using estimation and rounding techniques. Round to the nearest whole number unless otherwise specified.

- Multiply 45 by 32
- Multiply 67 by 89
- Multiply 3.7 by 8.2
- Multiply 98.6 by 5.4
- Multiply 23 by 17.5
- Multiply 6.8 by 9.3
- Multiply 123 by 456
- Multiply 789 by 321
- Multiply 4.6 by 7.9
- Multiply 48.9 by 2.5

Round to the nearest tenth and estimate the product.

- 4.7 x 2.9
- 8.3 x 7.6
- 1.2 x 5.9
- 9.8 x 2.5
- 6.4 x 3.7

Use estimation to determine which of the following products is the largest.

- 87 x 14
- 92 x 13
- 84 x 16
- 79 x 19
- 81 x 17

Use estimation to determine which of the following products is the smallest.

- 35 x 12
- 42 x 9
- 27 x 16
- 23 x 19
- 18 x 21

Round to the nearest hundredth and estimate the product.

- 5.67 x 2.34
- 8.91 x 4.57
- 1.23 x 6.78
- 9.87 x 2.54
- 6.43 x 3.76

Round to the nearest thousandth and estimate the product.

- 45.678 x 23.456
- 67.891 x 89.123
- 12.345 x 56.789
- 98.765 x 43.210
- 23.456 x 17.890

Use estimation to solve the following word problems.

- A truck can carry 4.5 tons of weight. How many tons can 7 trucks carry?
- A bookshelf has 5 shelves. Each shelf can hold 15 books. How many books can the bookshelf hold in total?
- A bag of rice weighs 2.3 pounds. How much does 8 bags of rice weigh in total?
- A classroom has 35 students. Each student has 3 pencils. How many pencils are there in total?
- A pack of gum costs $1.25. If you buy 4 packs of gum, how much will it cost you in total?

Round to the nearest ten thousand and estimate the product.

- 3,456 x 8,923
- 7,891 x 4,321
- 2,345 x 6,789
- 9,876 x 5,432
- 2,345 x 1,789

Round to the nearest hundred thousand and estimate the product.

- 23,456 x 17,890
- 98,765 x 43,210
- 45,678 x 23,456
- 67,891 x 89,123
- 12,345 x 56,789

Use estimation to determine the approximate answer.

- 23,456 x 1,234.56
- 9,876 x 7.89
- 6,789 x 4.32
- 98.76 x 54.32
- 23.45 x 67.89

Round to the nearest hundred and estimate the product.

- 56 x 89
- 34 x 67
- 41 x 58
- 75 x 29
- 82 x 47

Round to the nearest hundred and estimate the product. Include units.

- A rectangle has a length of 15.6 cm and a width of 8.2 cm. What is the area of the rectangle?
- A swimming pool has a length of 25.4 meters and a width of 12.8 meters. What is the area of the pool?
- A box has a height of 9.3 inches, a length of 7.6 inches, and a width of 4.8 inches. What is the volume of the box?
- A cylindrical tank has a diameter of 12.5 meters and a height of 18.9 meters. What is the volume of the tank?
- A triangular prism has a base with a length of 8.4 meters and a height of 6.2 meters. The prism has a height of 3.5 meters. What is the volume of the prism?

Round to the nearest hundredth and estimate the answer.

- 23.45 / 6.78
- 67.89 / 9.87
- 98.76 / 5.43
- 4.32 / 1.23
- 56.78 / 2.34

Round to the nearest ten and estimate the answer.

- 345 + 678
- 456 + 789
- 567 + 891
- 678 + 912
- 789 + 123

Round to the nearest hundred and estimate the answer.

- 1,234 + 5,678
- 6,789 + 2,345
- 9,876 + 4,321
- 3,456 + 7,891
- 2,345 + 6,789

Round to the nearest ten and estimate the answer. Include units.

- If a truck travels 45 miles in 2.5 hours, how fast is it going?
- If you walk 10,000 steps in a day, how many steps will you walk in a week?
- If a parcel weighs 3.2 pounds and you have to ship 50 of them, how much will they weigh in total?
- If a recipe calls for 2 cups of flour and you want to make 10 cupcakes, how much flour do you need?
- If a bottle of water contains 500 ml and you drink 3 bottles a day, how much water do you drink in a week?

Round to the nearest hundredth and estimate the answer.

- 23.45 + 6.78
- 67.89 + 9.87
- 98.76 + 5.43
- 4.32 + 1.23
- 56.78 + 2.34

Round to the nearest thousand and estimate the answer.

- 345 + 678 + 901
- 234 + 567 + 890
- 123 + 456 + 789
- 345 + 678 + 901 + 234
- 123 + 456 + 789 + 890

Round to the nearest ten thousand and estimate the answer.

- 12,345 + 67,890 + 23,456
- 98,765 + 43,210 + 56,789
- 34,567 + 89,012 + 12,345
- 23,456 + 78,901 + 45,678 + 90,123
- 67,890 + 12,345 + 23,456 + 56,789

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