Mental Math
Adding
Subtracting
Adding & Subtracting
Find the Missing Part
100
300+400= ________
300+400 = 700
100
803+174=_______
803+174= 977
100
688-276=________
688-276=412
100
Add 300+250=______. Then subtract 123.
300+250=550 550-123=427
100
Find the missing part. 400+______=630
400+230=630
200
950-500= _______
950-500= 450
200
456+274=______
456+274=730
200
640-155=_______
640-155= 485
200
Kyle collected 250 stamps when he was ten years old and then 200 stamps when he was twelve years old. When he was thirteen, he sold 175 of the stamps. How many stamps does he have left?
250+200=450 450-175=275
200
Find the missing part. 325+______=508
325+183=508
300
620+200= ______
620+200= 820
300
What is the sum of 842 + 128?
842+128=970
300
What is the difference of 972-543?
972-543= 429
300
The tree had 328 leaves in the spring. In the summer it grew 343. Then in the fall, the tree lost 440 leaves. How many leaves was the tree left with?
328+343=671 671-440=231
300
The store had 500 shirts. There were 200 red shirts and the rest were blue. How many blue shirts did the store have? 200+_____=500
200+300=500
400
700-350=______
700-350= 350
400
Michael is getting ready for his birthday party. He blew up 190 balloons for the house and 319 balloons for the backyard. How many balloons did Michael blow up?
173+319=492
400
The pizza store made 345 large pizzas. That night, they sold 252 of the large pizzas. How many pizzas were left to sell?
345-252=93
400
Target hired 150 new employees in the winter and then hired 415 new employees in the summer. Then in the fall, 178 employees quit. How many employees still work at Target?
150+415=565 565-178=387
400
At the bookstore, the librarian counted a total of 900 books. There were 415 non-fiction books and the rest were fiction books. How many fiction books are in the library? 415+________= 900
415+485=900
500
190+400 =_______ 400-290 = _______
190+400= 590 400-290= 110
500
On Saturday morning, 273 dogs visited the dog park. On Saturday afternoon, 338 dogs visited the dog park. How many dogs went to the dog park on Saturday?
273+338= 611
500
Kelly got a box of 500 markers from the store. She lost 134 markers in her room. How many markers does she have left?
500-134= 366
500
The Toy Shop made 147 dolls in the morning. During the day, 463 yo-yos were made. 433 yo-yos were sold at the Toy Shop today. How many toys were left at the end of the day?
147+463=610 610-433=177
500
583 people went to the school. 194 of those people were the teachers and the rest were the students. How many students went to the school? 194+______=583
194+389=583