Question

lesson 2: number concepts (cont.)

1. what is the meaning of 690?

a 69 hundreds
b 6 hundreds and 9 ones
c 69 tens
d 6 hundreds and 9 tens

1. which number can be expressed as (14 + 5) + (9 × 3) − 1?

f 30
g 31
h 46
j 45

1. what is the correctly written expanded numeral for 265?

a 200 + 60 + 5
b 260 + 5
c 2 + 6 + 5
d 200 + 65

1. what is 42 in written form?

f fourteen two
g four two
h forty - two
j fourty - two

1. what is another way to write ten thousands?

a 10 + 1,000
b 1,000
c ten 1,000
d 10,000

1. shawn is collecting stones for a project. on the first day, he collects 100. on the second day, he collects 20. on the third, he finds 3 stones. which number shows how many stones he collected in all?

f 23
g 123
h 1,023
j 24

1. what is the standard form of 5,000 + 70 + 9?

a 579,000
b 5,790
c 5,079
d 579

1. what is the standard form of forty - two thousand nine hundred and one?

f 42,910
g 42,901
h 4,291
j 429,100

Explanation:

Step1: Solve Q7: Analyze 690's place value

690 = 6×100 + 9×10, so it is 6 hundreds and 9 tens.

Step2: Solve Q8: Calculate the expression

First compute parentheses: $(14+5)=19$, $(9×3)=27$
Then sum and subtract: $19+27-1=45$

Step3: Solve Q9: Expand 265 by place value

265 = 2×100 + 6×10 + 5×1 = $200+60+5$

Step4: Solve Q10: Write 42 in word form

The correct written form is forty-two.

Step5: Solve Q11: Convert ten thousands to standard form

Ten thousands = $10×1000=10,000$

Step6: Solve Q12: Sum total stones

Total = $100+20+3=123$

Step7: Solve Q13: Compute standard form

$5,000+70+9=5,079$

Step8: Solve Q14: Convert word to standard form

Forty-two thousand nine hundred and one = $42×1000 + 9×100 + 1=42,901$

Answer:

1. D. 6 hundreds and 9 tens
2. J. 45
3. A. $200 + 60 + 5$
4. H. forty-two
5. D. 10,000
6. G. 123
7. C. 5,079
8. G. 42,901