Rounding
Round 37 to the nearest 10.
40
Carry has 24 pencils. She loses 5 of them. How many pencils does she have left?
19 pencils
Which of the following is a way to break apart the second addend in the equation: 24+ 64?
a. 24 + 50 + 4
b. 20 + 4 + 64
c. 24 + 6 + 4
d. 24 + 60 + 4
d. 24 + 60 + 4
What is a reasonable solution for 33 + 51?
80
76
True or False. All of the following numbers round to 30: 25, 31, 24, 29
False
Jim bought 27 lollipops. He is given 14 more lollipops. How many lollipops does he have in all?
41 lollipops
Which of the following is a way to break apart the second addend in the equation 50 + 42?
a. 50 + 40 + 1 + 1
b. 5 + 10+ 42
c. 50 + 4 + 2
a. 50 + 40 + 1 + 1
Is 30 a reasonable solution for the equation 23 + 12?
Yes or no
Yes
30 + 40 + 3 + 2 =
75
Which of the following rounds to 80:
70, 89, 83, 85
83
Daniel has 34 stickers. Dylan has 27 more stickers than Daniel. How many stickers does Dylan have?
61 stickers
Which of the following is NOT a way to break apart the second addend in the equation 30 + 26
a. 30 + 20 + 6
b. 30 + 20 + 3 + 3
c. 30 + 20 + 1 + 5
d. 30 + 20 + 5 + 2
d. 30 + 20 + 5 + 2
Bren has 34 markers. Mark has 24 markers. Is 77 a reasonable solution for both students' markers?
No, 77 is not close to my estimate 50.
Which are equal to 62 + 21 ?
a. 30 + 53 =
b. 40 + 22 =
c. 60 + 20 =
a. 30 + 53= 83
Round 15 to the nearest 10.
20
Matthew has 56 buttons. He gives away 32 buttons. Then he buys 12 more buttons. How many buttons does he have now?
76 buttons
Provide one way to break apart the second addend 50 + 47.
Possible answers:
50 + 40 + 7
50 + 40 + 5 + 2
Addison has 44 pokemon cards. Mia has 35 pokemon cards. Is 79 a reasonable solution for both girls' cards?
Yes, 79 is close to my estimate of 80 cards.
Which have a sum of 49? Choose all that apply.
a. 30 + 12
b. 40 + 9
c. 20 + 39
d. 31 + 18
b. 40 + 9
d. 31 + 18
Round 94 to the nearest 10.
90.
Stella has 23 erasers. She buys 12 more. Then she gives her friend 6 of them. How many erasers does she have left?
29 erasers
Provide one way to break apart the second addend in 15 + 76
Possible answers:
15 + 70 + 6
15 + 70 + 3 + 3
Brady has 44 bouncy balls. He buys 12 more. Is 66 a reasonable solution for his total bouncy balls?
No, 66 is not close to my estimate 50.
What is the sum of 88 + 12?
100