Numbers
Odd numbers end in...
Even numbers end in...
Odd: 1, 3, 5, 7, 9
Even:0, 2, 4, 6, 8
136 + 744 =
880
645 - 123
522
43 rounded to the nearest 10 is
40
Nicolas has 281 pokeman cards. Arianna takes 29. Harper estimates Nicolas will have about 250 left over. Is Harper correct?
Yes, 252 rounds to 250.
Classify these numbers into even or odd:
230, 245, 260, 275, 300, 315, 330
Odd: 245, 275, 315
721 + 999 =
1,720
522- 164
358
43 rounded to the nearest 100 is
There are 20 people in a class room. Each take 7 erasers for their desks. About How many erasers are being used?
140 erasers are being used
What is the pattern in these numbers?
230, 245, 260, 275, 300, 315, 330
+ 15
171 + 192 =
363
358 - 192
166
127 rounded to the nearest ten is 120. True or false?
False, it rounds to 130
182 are in 8th grade. 102 are in 9th grade. About how many kids are in both grades?
or about 280
There are 100 gummy bears. 10 students each take 8 gummy bears from a bag. The number of gummy bears left in the bag is g.
Which equation represents the situation?
a) 100 - (10 x 8) = g
b) 100 - 8 = g
c) 100 + (10 x 8) = g
d) (8 x g) = 100
a) 100 - (10 x 8) = g
408 + 497 =
905
166 - 89
77
1000
90 + h = 180
What is h?
h = 90
Solve for h.
(h + 30) + 20 = 60
h = 10
1,032
400 - 189
211
There are seats for 600 students in an audiotorium. Sifan's class takes up 17 seats. Hannah's class takes up 22 seats. Messiah estimates there will be about 40 seats will be taken up. Is he correct?
Malaysia estimates there will be about 500 seats that are empty. Is she correct?
Messiah is correct, 17 + 22 = 39, which rounds to about 40.
Malaysia is incorrect, 600 - 40 = 560, which is closer to 600 than it is to 500.
(90 + h) - 40 = 180