Mental Math
There were 23 ghosts and 68 ghouls at the Greenfield Halloween Parade. How many creatures were there in all? Use mental math to solve.
91 creature in all
What is the best estimate for 2,842 + 2,381?
What is 5,000
What is 1,618 students.
Subtract 637 - 453.
What is 184.
Porter scored 5,772 points playing Blooket. Maverick scored 4,881 points in the same game. How many more points did Porter score than Maverick?
What is 891
To subtract 143-75 using mental math, Kaydence subtracted 143-80 and got 63. What should she do next?
She should add 5.
What is the best estimate for 3,603 + 1,098?
5,000
If Zach scores 15,986 points in Game 1 and he scores 4,231 more points than that in Game 7. How many total points did he score in Game 7?
What is 20,217 points
Subtract 949 - 885.
What is 64.
Cassidy had $1,500 in her checking account. She took out $173 to buy a new electric scooter. How much money is left in her checking account?
What is $1,327
To subtract 115-88 using mental math, Reid subtracted 115-90 and got 25. What should he do next?
He should add 2.
What is the best estimate for 5,665 + 3,099?
9,000
Keden has 95 baseball cards, 75 basketball cards, and 100 football cards. How many sports cards does Keden have in all?
What is 270 cards.
Subtract 559 - 381.
What is 178.
Khia had $2,000 in a savings account. She withdrew $273 to buy a new bike. How much money is left in her account?
What is $1,727
Ms. Rodman has 39 skittles and 98 m&m's in a bowl. Use mental math to find how many pieces of candy there are in all in the bowl.
What is 137
Ridley estimated 3,954 + 2,065 by rounding each number to the nearest thousand. What did she add?
4,000 + 2,000
Last year the bakery made 32,472 cookies. This year the bakery made 18,583 cookies. How many cookies did they bake altogether?
What is 51,055 cookies.
Subtract 1,667 - 763.
What is 904
Katey spent $259 at the book fair. She gave Ms. Kreiner a gift card for $88. How much more money does she have to pay?
What is $171
Mr. Johnson was born in 1908. In what year was Mr. Johnson 53 years old? Use mental math to solve.
What is 1961
Jocelyn estimated 4,903 + 4,093 by rounding each number to the nearest hundred. What did she add?
5,000 + 4,100
There are 14,720 airports in the U.S., 2,743 in Russia, and 1,417 in Canada. How many airports are there altogether between the three countries?
What is 18,880 airports
Subtract 4,475 - 849.
What is 3,626.
The American Revolutionary War began in 1775. The first man landed on the moon in 1969. How many years passed between the beginning of the Revolutionary War and the moon landing?
What is 194 years.