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, what does the word SUM mean?
The sum is the answer in an addition problem.
Two numbers add up to 20. Their difference is 4. What are the two numbers?
12 and 8
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, what does the word QUOTIENT mean?
The quotient is the answer to a division problem.
There are 18 crayons in a box. Some are red and some are blue. There are 6 more blue crayons than red crayons. How many of each color are there?
Red = 6, Blue = 12
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, what does the word DIFFERENCE mean?
The difference is the answer in a subtraction problem.
The camp kitchen is making a special trail mix. For every 2 scoops of M&Ms, they add 3 scoops of pretzels and 5 scoops of raisins. The kitchen staff keeps adding ingredients using this exact pattern until they have poured in a total of 24 scoops of pretzels. How many total scoops of ingredients (M&Ms, pretzels, and raisins combined) are in the giant trail mix bowl?
80 scoops
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, what does the word PRODUCT mean?
The product is the answer to a multiplication problem.
There are 24 marbles in a jar. Some are blue and some are green. There are 8 more blue marbles than green marbles. How many of each color are there?
8 green, 16 blue
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, what does the word ADDEND mean?
The addend is the numbers being added together in an addition problem.
A Visionary team is playing a math strategy game to earn points. In the final round, they lost 15 points for an incorrect guess. Right before that, they answered a bonus question correctly, which doubled their score. In the first round of the morning, they had earned 20 points. At the end of the whole game, their final score sheet reads 45 points. What was their score after the first round but before the bonus question doubled it?
30 points