Estimating Products
What is an estimate for 4.2×3.94?
4.2 x 3.94 is about 4 x 4 = 16
What is 23×15? *MUST SHOW WORK*
23 x 15 = 345
What is 0.6×0.04? *MUST SHOW WORK*
0.6 x 0.04 = 0.024
What is 3.2×101?
3.2×101 = 32
If a bag of flour weighs 2.5 pounds and you buy 4 bags, how much flour do you have in total? *MUST SHOW WORK*
2.5 x 4 = 10 pounds of flour
Round 5.765 and 2.48 to the nearest whole number before multiplying. What is the estimated product?
6 x 2 = 12
Multiply 45×12 using the standard algorithm. *MUST SHOW WORK*
45 x 12 = 540
Multiply 3.50×2.1. *MUST SHOW WORK*
3.50 x 2.1 = 7.350
What is 4.5 x 102?
4.5 x 102 = 450
You saved $12.25 each week for 16 weeks. How much did you save in total? *MUST SHOW WORK*
$12.25 x 16 = $196
Round 28.076 and 3.98 to the nearest whole number before multiplying. What is the estimated product?
28 x 4 = 112
Calculate 56×34 using the area model. *MUST SHOW WORK*
56 x 34 = 1,904
Multiply 0.75×0.8. *MUST SHOW WORK*
0.75 x 0.8 = 0.6
What is 0.08×102?
0.08×102 = 8
A pencil costs $0.75. How much do 26 pencils cost? *MUST SHOW WORK*
$0.75 x 26 = $19.50
If you estimate 6.5×2.3, what two whole numbers would you round to? AND what would the product be?
7 x 2 = 14
Solve 178×19, using any strategy. *MUST SHOW WORK*
178 x 19 = 3,382
How do you determine the number of decimal places in the product of 0.5×0.06? What is the product? *MUST SHOW WORK and EXPLAIN DECIMAL PLACEMENT*
0.5 x 0.06 = 0.030
You are multiplying tenths and hundredths, answer needs to be in the thousandths.
Explain what happens to a decimal when you multiply it by 103.
Decimal moves 3 places to the left.
If you run 1.25 miles each day for 30 days, how many miles do you run in total? *MUST SHOW WORK*
1.25 x 30 = 37.5 miles
What is an estimate for 46.07 x 7.9?
46 x 8 = 368
What is the product of 123×45? *MUST SHOW YOUR WORK*
123 x 45 = 5,535
What is the product of 3.25×0.39? *MUST SHOW YOUR WORK*
3.25 x 0.39 = 1.2675
What is 0.501 ×103?
0.501 ×103 = 501
A recipe calls for 2.75 tablespoons of butter. If you make 3 batches, how much butter do you need in total? *MUST SHOW WORK*
2.75 x 3 = 8.25 tablespoons of butter