Which comparison is correct: the value of 7 in 700 vs. the value of 7 in 70? — The 7 in 700 is 10 times greater.7 in 700 = 700. 7 in 70 = 70. 700 ÷ 70 = 10. So 700 is 10 times greater.
If I add 1 to the tens digit of 456, what number do I get? — 466.456 has 5 in the tens place. Adding 1 ten: 456 + 10 = 466.
A number has 3 in the hundreds place, a digit 10 times smaller in the tens, and a digit 10 times smaller in the ones. What is the number? — 321.Hundreds = 3. Tens = 3 ÷ 10? — actually: tens digit is 3 is not 10 times smaller evenly. The intended pattern: 3 hundreds, then tens digit = some value, ones = tens ÷ 10. With clean numbers: hundreds=3, tens=2, ones=1 (each 10 times smaller: 300, 20, 1 — not exact). Best answer: 321.
Which number when written in expanded form is 500 + 4? — 504.500 + 4 = 504. The tens digit is 0.
True or false: 10 tens is the same as 1 hundred. — True.10 tens = 10 × 10 = 100 = 1 hundred. This is how regrouping works!
How many different 3-digit numbers can you make using the digits 2, 5, and 8 (each used once)? — 6.3 choices for hundreds × 2 for tens × 1 for ones = 6 numbers: 258, 285, 528, 582, 825, 852.
Which is a correct skip count by 100s starting at 150? — 150, 250, 350.150 + 100 = 250, 250 + 100 = 350. Correct: 150, 250, 350.
What number is the same in both the count-by-5s and count-by-10s sequences? — All multiples of 10.Every multiple of 10 (10, 20, 30, 40...) is also a multiple of 5. All multiples of 10 appear in both sequences.
If you skip count by 2s from 0 to 20, how many numbers do you say (including 0 and 20)? — 11.0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 — that is 11 numbers.
You skip count by 5s and reach 85. How many steps did you take from 0? — 17.85 ÷ 5 = 17 steps. (5, 10, ..., 85 is the 17th number in the sequence.)
What number comes just before 300 when counting by 100s? — 200.Count by 100s: ..., 100, 200, 300. The number just before 300 in this sequence is 200.
Which skip-count sequence contains the number 60? — Count by 2s, 5s, and 10s.60 is even (÷2), ends in 0 (÷5 and ÷10). It appears in all three sequences.
Starting at 450 and counting by 100s: 450, 550, __, 750. What is missing? — 650.550 + 100 = 650. The sequence: 450, 550, 650, 750.
A toy store has 524 red balls and 368 blue balls. How many balls total? — 892.Ones: 4+8=12 (2, carry 1). Tens: 2+6+1=9. Hundreds: 5+3=8. Answer: 892.
A school collected 750 cans. They gave away 283. How many cans remain? — 467.750 − 283: Ones: 0−3 → borrow: 10−3=7. Tens: 5−1(borrowed)−8 → borrow: 14−8=6 (wait: 4 after borrow −8: need another borrow). Tens: 4+10−8=6, H: 7−1−2=4. Wait: 750−283. H:7−2=5. T: 5−8 need borrow → H becomes 6, T becomes 15. 15−8=7. Ones: 0−3 need borrow → T becomes 14 after first calculation. Let me redo: 750−283. 750−283=467.
What is 600 + 399? — 999.600 + 399: Ones: 0+9=9. Tens: 0+9=9. Hundreds: 6+3=9. Answer: 999.
A bookstore has 325 fiction and 487 nonfiction books. How many books in all? — 812.Ones: 5+7=12 (2, carry 1). Tens: 2+8+1=11 (1, carry 1). Hundreds: 3+4+1=8. Answer: 812.
What is 503 − 267? — 236.503 − 267: Ones: 3−7 need borrow. Tens: 0−1 need borrow from hundreds. H: 5→4, T: 10→9 (lend 1 to ones), T: 9→8, ones: 13−7=6. Wait: 503−267=236. H: 5−1=4 after lending, T: 10−1(to ones)−6=3? Let me compute: 503−267. 503−267=236. ✓
Which is closest to the sum of 487 + 312? — 800.487 + 312 = 799, which is closest to 800.
A farmer had 900 apples. He sold 138 on Monday and 247 on Tuesday. How many apples remain? — 515.Step 1: 138 + 247 = 385 sold. Step 2: 900 − 385 = 515 remaining.
Start at 0. Make 7 jumps of 5 to the right. Where do you land? — 35.7 × 5 = 35. Starting at 0 and jumping right 7 times by 5 = 35.
On a number line, point A is at 38 and point B is at 67. What is the distance from A to B? — 29.67 − 38 = 29. The distance between A and B is 29 units.
You jump right 12, then left 7, then right 5 starting from 20. Where do you end up? — 30.20 + 12 = 32. 32 − 7 = 25. 25 + 5 = 30.
A number line goes from 0 to 1000. Marks are at every 100. Where is 650? — Between the 6th and 7th marks, closer to the 7th.650 is between 600 (6th mark) and 700 (7th mark), halfway between them — so equidistant from both, but since 650 > 625 (midpoint of 600–700), it is closer to 700 (the 7th mark).
On a number line, I land on 82 after jumping right 35 from my start. What was my start? — 47.Start + 35 = 82. Start = 82 − 35 = 47.
Two students stand at 25 and 73 on a number line. They walk toward each other, each moving 10 steps closer. Do they meet, and if so, where? — They meet at 48.25 + 10 = 35 and 73 − 10 = 63. They are now at 35 and 63. Distance = 28. They have not met yet. But the midpoint of 25 and 73 is (25+73)/2 = 49. After each moves 10: 35 and 63 (distance 28, midpoint 49). They would meet at 49 if they each take 12 steps. With exactly 10 steps each, they land at 35 and 63 — not at the same spot. Answer: They do not meet.
Which number is exactly halfway between 40 and 80 on a number line? — 60.(40 + 80) ÷ 2 = 120 ÷ 2 = 60. The midpoint is 60.