Patterns and Mental Math
The number that is ten times greater than three hundred.
What is 3,000?
The estimate of 180 x 586
What is 120,000?
1,945 x 3 = _______
What is 5,835?
The product of 406 and 54.
What is 21,924?
The estimate of 372 x 42 using rounding.
What is 23,800?
The result of mujtiplying four by ten to the third power.
What is 4,000?
The estimate of 25 x 191.
What is 6,000?
Find the product of 72 x 91
What is 6,552?
The product of 780 and 36.
What is 28,080?
The estimate of 372 x 42 using compatible numbers.
What is 16,000?
The product of 374 and 100.
What is 37,400?
The estimate of 854 x 733.
What is 630,000?
Calculate the area of a rug that is 72 inches by 96 inches.
What is 6,912 square inches?
A crate holds 205 avacodos. 7,000 avacodos were picked. The company has 36 crates. Does the company have enough crates for all of the avocados? Explain.
Yes because 205 x 36 = 7,380. The company has more than enough crates.
Kai ordered 1,012 baseball cards. Sharon ordered 5 times as many. Write and solve an equation to find b, the number of baseball cards Sharon ordered.
What is
1,012 x 5 = b
b=5,060
Which expression is greater?
11 x 104 or 93 x 103
11 x 104
Lance has 102 packages of sports cards. Each package has 28 cards. About how many cards does Lance have?
What is about 3,000 sports cards?
The product of 481 x 35.
What is 16,835?
Julia needs a trombone for 12 months. She can rent the trombone for $34 per month or buy it for $495. Should she buy or rent the trombone? Explain.
She should rent because 12x34 = $408 and $408<$495.
Rosanne has 142 songs in her phone. Teresa has 11 times as many songs as Rosanne. How many songs does teresa have?
What is 1,562 songs?
There are 2,000 pounds in 1 ton. In the US, the weight limit for a truck and its cargo is 40 tons. How many pounds is that?
What is 80,000 pounds?
Estimate 530 x 325.
Is the estimated product an over estimate or an under estimate?
150,000
Under estimate
A patio will be 108 bricks wide and 19 bricks long. How many bricks will be needed to build the patio?
What is 2,052 bricks?
When you multiply a 3 digit number by a 2 digit number what is the greatest number of digits the product can have?
What is 5?
There are 36 large fish tanks at the zoo. Each tank holds 205 gallons of water. How many gallons of water would it take to fill all of the tanks?
What is 7,380 gallons of water?