# SECTION TIME 15 Minutes

Subject #____V1

Number Sentences May 2009

## First Name ______

SECTION TIME – 15 minutes

1. (ST2) For each example, decide if the number sentence is true. In other words, does it make sense?

After each problem, circle True, False, or Don’t Know.

Samples:

3 + 4 = 7 True FalseDon’t Know

3 + 4 = 12True FalseDon’t Know

a-b) 8 = 8TrueFalseDon’t Know

b-d) 7 + 6 = 0TrueFalseDon’t Know

c-e) 5 + 3 = 3 + 5TrueFalseDon’t Know

d-g®) 8 = 5 + 10TrueFalseDon’t Know

e-i) 3 + 1 = 1 + 1 + 2TrueFalseDon’t Know

f-n®) 4 = 4 + 0TrueFalseDon’t Know

2. (ST3) For each example, decide if the number sentence is true. Then,

explain how you know.

a®) 8 = 5 + 3TrueFalseDon’t Know

How do you know?

b) 4 + 1 = 2 + 3TrueFalseDon’t Know

How do you know?

3. (ST5®) Without adding 89 + 44, can you tell if the number sentence below is true or false?

89 + 44 = 87 + 46

How do you know?

4. (ST10a) Find a number that can go in each box.

1 + 9 + = 10 +

b) Could another number go in the boxes? YESNO

Explain why or why not.

5. (ST7a) 25 + 14 = 39 is true.

Is 25 + 14 + 7 = 39 + 7 true or false?

TrueFalse Don’t Know

How do you know?

6. (ST8a) 3 x 5 = 15 is true

Is 3 x 5 x 6 = 15 x 6 true or false?

TrueFalseDon’t Know

How do you know?

7. (ST6) Without subtracting the 9, can you tell if the statement below is true or false?

76 + 45 = 121 is true.

Is 76 + 45 – 9 = 121 – 9 true or false?

TrueFalse Can’t tell without subtracting

How do you know?

8. (ST9a) Is the number that goes in the box the same number in the following two number sentences?

3 x = 45 7 x 3 x = 7 x 45

YesNo Don’t Know

How do you know?

SECTION TIME – 5 minutes

9. (ES1) What does the equal sign (=) mean?

Can it mean anything else?

10. (ES3®). Which of these pairs of numbers is equal to 3 + 6? Circle your answer.

a) 2 + 7

b) 3 + 3

c) 3 + 9

d) none of the above

11. (ES4) Which answer choice below would you put in the empty box to show that ten cents is the same amount of money as one dime? Circle your answer.

10 centsOne dime

a) 10¢

b) =

c) +

d) don’t know

12. (ES5) Is this a good definition of the equal sign? Circle good or not good.

a. The equal sign means two amounts are the same.Good Not good

b. The equal sign means count higher.GoodNot good

c c®. The equal sign means the total.GoodNot good

13. (ES6) Which of the definitions above is the best definition of the equal sign? Write a, b, or c in the box below.

14. (ES8)

a) Is this statement true or false?

1 quarter = 25 pennies

True FalseDon’t Know

b) What does this equal sign mean?

SECTION TIME – 12minutes

DIRECTIONS: Find the number that goes in each box.

15. (OE2)6 + 2 =

16. (OE4) + 5 = 9

17. (OE6)7 = + 3

18. (OE8)5 + = 6 + 2

19. (OE10)3 + 6 = 8 +

DIRECTIONS: On these problems, we really need you to show your math. Find the number that goes in each box.

20. (OE11)4 + 5 + 8 = + 8

21. (OE13)+ 9 = 8 + 5 + 9

22. (OE15)8 + 5 – 3 = 8 +

DIRECTIONS: Find the number that goes in each box. You can try to find a shortcut so you don’t have to do all the adding. Show your work and write your answer in the box.

23. (OE21)67 + 84 = + 83

24. (OE23) + 55 = 37 + 54

25. (OE27a) Find the value of n. In other words, what value of n will make the following number sentence true? Circle your answer.

13 = n + 5

26. (OE25) Find the value of c.

c + c + 4 = 16

27. (OE28a) Find the value of z.

z + z + z = z + 8

1

May 2009