Maths Olympiad Grade 3 Addition and Subtraction Test-2


Addition and Subtraction

 

  1. Durga had some toy cars in a bag. She gave 8 of the cars to Shankar. After that, Durga had 10 toy cars. How many toy cars were in the bag before Durga gave them to Shankar?

       A. 18                   B. 12                    C. 9                     D. 2

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  1. Numbers that go into the machine below are changed to a different number using a rule.

       Which of the following could be the rule the machine uses?

       A. Add 1             B. Add 3             C. Add 7             D. Add 10

 

  1. What number goes in the blank place to make the number sentence below true?

       (42 + 35) + 26 = 42 + (□ + 26)

       A. 35                   B. 42                   C. 77                   D. 103

 

  1. The first four figures in a pattern are shown below:

       

       If the pattern continues this way, how many blocks are needed to make 6th step?

       A. 15                   B. 18                   C. 21                    D. 23

 

  1. The two number sentences shown below are true.

       □ + □ = 6

       □ + ∆ = 12

       Which of the following values for ∆ and □ make both number sentences true?

       A. ∆ = 3 and □ = 9                        B. ∆ = 4 and □ = 8

       C. ∆ = 15 and □ = 3                      D. ∆ = 9 and □ = 3

 

Answers

(6)–A; (7)–C; (8)–A; (9)–C; (10)–D