Rounding
Round each number to the nearest TEN....
42, 85, 629, 812
40, 90, 630, 810
True or False:
139 + 141 = 140 + 142
False
True or False:
231 - 219 = 232 - 220
True
When solving an addition problem, what does the word SUM mean?
The sum is the answer in an addition problem.
I come with many colors, so beautiful and bright, I turn so many houses into a beautiful sight. What am I?
Christmas lights!
Round each number to the nearest HUNDRED...
242, 485, 629, 812
200, 500, 600, 800
Fill in the blank...
543 + 529 = _____ + 530
542
Fill in the blank...
543 - 529 = _____ - 530
544
When solving a subtraction problem, what does the word DIFFERENCE mean?
The difference is the answer in a subtraction problem.
Which one of Santa’s reindeer is the fastest?
Dasher!
Which TWO numbers can you add to get CLOSEST to 500?
655, 300, 213, 525
300, 213
Solve this addition combination. Use a strategy that is more efficient than counting on by 1s. Show your work. Write an equation to show the combination and the answer.
23 + 48
23 + 48 = 71
Strategies will vary.
Solve this subtraction combination. Use a strategy that is more efficient than counting back by 1s. Show your work. Write an equation to show the combination and the answer.
182 - 27
182 - 27 = 155
Strategies will vary.
When solving an addition problem, what does the word ADDEND mean?
The addend is the numbers we are adding together in the equation.
What do you call a person who is afraid of Santa Claus?
Claustrophobic
Which TWO numbers can you add to get CLOSEST to 1,000?
655, 300, 213, 525
655, 300
Solve this addition combination. Use a strategy that is more efficient than counting on by 1s. Show your work. Write an equation to show the combination and the answer.
405 + 112
405 + 112 = 517
Strategies will vary.
Solve this subtraction combination. Use a strategy that is more efficient than counting back by 1s. Show your work. Write an equation to show the combination and the answer.
224 - 115
224 - 115 = 109
Strategies will vary.
When solving a subtraction problem, what does the word MINUEND mean?
The minuend is the first number we are subtracting from in an equation.
How many reindeers does Santa ride?
9 reindeers
When rounding, how do you know when to round DOWN and when to round UP?
Round down = under 500, 50, 5
Round up = 500, 50, 5 or above
The school had 253 students. Over winter break, 64 students moved away, but 16 new students moved in. How many students are now in the school?
Show your work and write an equation to represent this problem.
253 - 64 + 16 = 205
Work will vary.
This month Rachel and Hannah had a contest to see who could read the most pages in class. By the end of the month, Rachel read 194 pages in class and Hannah read 158 pages. Who read the most and won the contest? How many more pages did the winner read than the loser?
Show your work.
Rachel
The winner read 36 more pages than the loser.
Strategies will vary.
When solving a subtraction problem, what does the word SUBTRAHEND mean?
The subtrahend is the second number we are taking away in the equation.
What would an apple and a Christmas tree get if they had a baby?
A pineapple