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Addition/Subtraction
Fun with Numbers
Δ = ?
Word Problems
100
75 written backwards is 57. If 73 is subtracted from 73 written backwards, the answer is _____.
36 (73 written backwards is 37. 73 – 37 = 36. )
100
What number is 4 away from 11 and 6 away from 1?
7 ( To get the number that is 4 away from 11, subtract 4 from 11. 11 – 4 = 7; To get the number that is 6 away from 1, 6 + 1 = 7 )
100
If 9+Δ = 14, how much is Δ + Δ?
10 9 + Δ = 14; Δ = 14 – 9 = 5; Δ + Δ = 5 + 5 = 10
100
Garret has 24 balloons and Elliot has 18 balloons. If Garret gave Elliot 10 of his balloons, Elliot will have ____ more balloons than Garret will have.
14 ( Garret has 24 balloons and Elliot has 18 balloons. If Garret gave Elliot 10 of his balloons, Elliot will have 24 – 18 = 14 more balloons than Garret will have. )
200
In these 2 problems, the larger answer is ___ more than the smaller answer: 103-41, 29-24
57
200
What number must be added to the sum of 13 and 18 to equal the sum of 20 and 22?
11 (20 + 22 = 42; 13 + 18 = 31; 42 – 31 = 11. Eleven must be added to the sum of 13 and 18 to equal the sum of 20 and 22. )
200
2 Δ + 3 Δ + 4 Δ = 103 What digit does Δ represent?
6
200
Taryn invited 45 children to her birthday party. Of those invited, 11 boys and 12 girls came to her party. How many of those invited did NOT come to her party?
22 (Number of children who attended the party = 11 + 12 = 23. Taryn invited 45 children to her birthday party. Number of children who did not come to her party = 45 – 23 = 22 )
300
Two numbers add to 13. If their difference is 5, find the larger number.
9
300
Five cards in a hat are numbered 1 through 5. One card is taken from the hat. The sum of the numbers remaining in the hat is 11. What numbered card was taken from the hat?
4 ( 5 + 3 + 2 + 1 = 11 )
300
If 9 + Δ = 16, what is the sum of Δ + Δ ?
14
300
Patrick is 9 years old now. Sean is 5 years older than Patrick was 3 years ago. How old will Sean be 4 years from now?
15
400
What number must be added to the sum of 13 and 19 to equal the sum of 19 and 23?
11
400
An alien ship lands on earth and spits out numbers 1, 2, 3, 4, and 5 to destroy our planet. In order to save the planet, bond these numbers using addition or subtraction to make number 333. But you can only use each number once (for example: 123+4+5).
345 – 12 = 333
400
If 8 + 9 = Δ – 5, what is the number that belongs in the Δ?
22
400
Linda and Joseph each have 12 cookies. How many cookies should Linda give to Joseph so that Joseph will have twice as many cookies as Linda?
4
500
Sam had 56 marbles. He gave half of the marbles to his brother. He then gave an equal number of marbles to each of 3 friends. He now has 16 marbles. How many marbles did he give to each of his 3 friends?
4
500
If the ten’s digits and the hundred’s digit of the number 15,325 are reversed, the larger number will be __________ more than the smaller number.
90 (15,325-15,235=90)
500
In the addition problem below, each time the same shape appears, it represents the same digit. Find the value of Δ+☻ Δ 9 + 5 ☻ = 1 ☻ 4
14 (Δ = 9, ☻=5, 9+5=14.)
500
Adam is 2 years younger than Akul. The sum of their ages is 16. How old will Adam be in 3 years?
10