# Word problems Addition and subtractions, operations and algebraic thinking

Surekha Waldia

Critical thinking
Understand These questions will help the teacher evaluate the students capacity to apply various concepts of addition and subtraction.

Only HOTS questions:

1. Look at the addition sentences.
6  + ___=  11
___  + 6  =  11

Which number should go where the __ is in each addition sentence?

2. Which is the related addition fact for 5+4=9?

a) 1+8=9 ; 1+8=9 b)2+7=9; 2+7=9  c)3+6=9; 3+6=9  d) 4+5=9

3. What is the related subtraction fact for 9-2=7?

a)7−2=5; 7-2=5 b)8−2=6; 8-2=6    c) 9−7=2; 9-7=2   d)10−3=7

4. When skip-counting by 2, follow the pattern below.

2, 4, 6, 8,                 What is the missing number?

6, 8, ____, 12,___16 what are the missing numbers?

5. You have 4 apples. You pick up 2 more apples that fell off the tree. How many apples do you now have?

6. Cindy has 5 dogs, 7 horses, and 5 cats. How many pets does she have in all?

7. Find the missing Addend : a) 3 +_ = 4 b) 5 +___ = 9  c) 7+___=7

8. Adding whole tens (2 digit) :

a) 10 + 70 = ____                 b) 30+50=____

9. You have 7 cookies and you ate 2 of them. How many cookies do you have left?

10. A bee has 6 legs. How many legs do 2 bees have?

11. A farm has 2 horses and 3 dogs. How many animal legs are there in total?

12.You have 5 pieces of candy. Your mom gives you 3 more, but your brother eats one of them. How many pieces of candy do you have left?

13. You have collected 7 balls. How many more balls do you need to collect to have 11 balls?

14. Add & subtract 3 single digit numbers

a) 5 + 6 – 1 =____

b) 7 + 6 – 9 =  ____

c) 3 + 7 – 4 =____

15. Solve these  mentally :

a)  10 – 1 = __

b) 10 – 6 = __

c) 10 – 3 = __

d) 6 – 3 = __

16. Mini saw 12 elephants and 5 seals at the circus. How many more elephants than seals did Mini see?

17. There were 21 children at a birthday party. 16 of them were picked up. The rest of them walked home on their own. How many children walked home?

18. Write the subtraction sentence that fits this: “Alvin was writing thank you cards for the 21 guests. He finished writing 7 cards and he still need to write 14 cards.”

19. There were 42 glasses of juice. The guests at the party spilled 4 glasses of juice and drank 31 glasses of juice. How many glasses were left?

Accurate