Mental Math
4 + 7 + 9
20
17 + 59 = 17 + _____ - _____
60 - 1
4, 2 5 _
+ 1,2 _
_________
4, _ 7 6
What is the missing digit for each blank?
Iman had $37 saved up, but still had $24 less than Mohamed! How much does Mohamed have saved up?
$61
Draw a bar model to fit the situation. Bennet has 5 marbles. His friend gives him 4 more. How many marbles does Bennet have in all?
____5____ __4__
9 in all
49 + 24
73
The sum of two even numbers is always an odd number. True or False?
FALSE!! It's always even!
2,815 + 1,077 is _____ more than 3,891.
a)1
b)10
c)100
d)1000
3,891
3,086 dogs visited a dog park on Saturday. 1,121 dogs visited on Sunday. How many dogs visited over the weekend?
4,207 dogs
Grace has 12 necklaces. Her grandma gifts her 9 more, but she looses one on the way home. How many necklaces does she have now? Make a bar model to show the situation!
__________12_______ _____9_______
_______________21_______________
_______________20____________ _1_
99 + 72
171
Jhon says that 3 + 10 + 7 is the same thing as 107 + 3 because of the community (switcheroo) property. Is he correct? If not, how else could you rewrite this equation with the community property?
3 + 7 + 10
7,425 + 2,399= ?
9,824
Abby saved $2,349. She saved $510 less than Duke. How much did Duke save?
How much did they save IN ALL?
Duke saved $2,850.
Together they saved $5,199.
A store sold 971 teddy bears on Monday. 59 more bears were sold on Tuesday than on Monday. How many bears were sold in the two days? Create a bar model AND find the answer.
Monday: ___971___
Tuesday: _________ _59_
T= 1,030
All Together: 2,001 bears
134 + 352
486
42 + 12 + 7 = 70 - _______
9
(70-9=61)
7,268 + 1,269= ?
8,537
The 2nd grade has 310 pencils. They have 98 less pencils than the 1st grade. How many pencils to the 1st and 2nd grade have in all?
2nd: 310 pencils
1st: 409 pencils
All together: 719 pencils
There are 5,129 red berries on a bush. There are 82 more blue berries on the bush than red berries. How many berries are there all together on the bush?\
Create a Bar Model and find the answer.
Red: _______5,129__________
Blue: _____________________ _82_
B: 5,211 berries
10,340 Berries in all!
298 + 572
870
Lila finds the sum of 2 + 4 + 6 + 8 + 10 and then finds the sum of 12 + 14 + 16 + 18 + 20. She finds a pattern.
What is the pattern?
Use the pattern to find the sum of 112 + 114 + 116 + 118+ 120.
The ones place stays the same for each equation. they always equal 30. Then you just have to add the tens or the hundreds onto the total!
560 is the sum.
2,694 + 7,638= ?
10,342
DOUBLE JEOPARDY:
Deonte went to a bicycle show. At the show, there were some tricycles (3 wheels) and bicycles (2 wheels).
He counted 25 wheels all together. How many bicycles and tricycles were there? There are 4 different possibilities, find as many as you can!
a) 2 bikes and 7 trikes
b) 5 bikes and 5 trikes
c) 8 bikes and 3 trikes
d) 11 bikes and 1 trike
Rick hula hooped for 113 seconds in the first round of the game. He hula hooped 68 more seconds in the second round than the first round. He said that the he hula hooped for 171 seconds in the second round. Do you agree with him? EXPLAIN!!!
No! He forgot to regroup... the real answer is 181.