Primary 1 Mathematics Flashcards: Open Sentences and Finding Missing Values

Question 1

A number statement that has a missing number is called an open ____.

Accepted Answer

sentence

Question 2

A box, a circle, a triangle or a letter used in place of a missing number is called a ____.

Accepted Answer

symbol

Question 3

What number completes $3 + \square = 5$?

Accepted Answer

2

Question 4

What number completes $4 + \square = 7$?

Accepted Answer

3

Question 5

What number completes $2 + \square = 6$?

Accepted Answer

4

Question 6

What number completes $5 + \square = 9$?

Accepted Answer

4

Question 7

What number completes $\square + 4 = 7$?

Accepted Answer

3

Question 8

What number completes $\square + 2 = 5$?

Accepted Answer

3

Question 9

What number completes $\square + 6 = 8$?

Accepted Answer

2

Question 10

What number completes $6 - \square = 2$?

Accepted Answer

4

Question 11

What number completes $8 - \square = 5$?

Accepted Answer

3

Question 12

What number completes $9 - \square = 4$?

Accepted Answer

5

Question 13

What number completes $\square - 3 = 4$?

Accepted Answer

7

Question 14

What number completes $\square - 2 = 5$?

Accepted Answer

7

Question 15

What number completes $\triangle + 1 = 4$?

Accepted Answer

3

Question 16

What number completes $x + 5 = 8$?

Accepted Answer

3

Question 17

Ada has 3 oranges and buys some more. Now she has 5. She bought ____ oranges.

Accepted Answer

2

Question 18

Tunde has 7 pencils and loses some. Now he has 4. He lost ____ pencils.

Accepted Answer

3

Question 19

If $5 + 2 = 7$, then $7 - 2 = \square$.

Accepted Answer

5

Question 20

If $4 + 3 = 7$, then $7 - 3 = \square$.

Accepted Answer

4

Strong work.