Place Value
What is the value of the digit 4 in the number 47?
40 (4 tens)
What is 36 + 23?
59
What is 58 − 25?
33
Is 38 odd or even?
Even
Write the number five hundred and thirty-two in digits.
532
What is 154 + 32?
186
What is 73 − 47?
26
List all the even numbers between 15 and 25.
16, 18, 20, 22, 24
What is the value of the digit 7 in the number 4,752?
700 (seven hundreds)
A shop sells 136 red balloons and 247 blue balloons. How many balloons were sold in total?
383 balloons
A baker made 145 muffins and sold 68. How many are left?
77 muffins
True or false: adding two odd numbers always gives an even number?
True — e.g. 3 + 5 = 8
I have 4 hundreds, 12 tens and 3 ones. What number am I? Hint: think carefully about what happens when you have more than 9 tens.
523 (12 tens = 1 hundred and 2 tens, so 4 + 1 = 5 hundreds, 2 tens, 3 ones)
45 tens and 6 ones
What is 400 − 156? Show two different strategies your team used.
244 (show your strategies! provide at least 2)
Even + Even = Even
Odd + Odd = Even
Even + Odd = Odd
Odd + Even = Odd
Arrange the digits 3, 6, 1 and 8 to make the largest possible 4-digit number and the smallest possible 4-digit number.
BONUS POINT: What is the difference between them?
Largest: 8,631 — Smallest: 1,368
BONUS = Difference: 7,263
A school collected 315 cans in Week 1 and 278 cans in Week 2. Their goal was 600 cans. Did they reach their goal? How many over or under were they?
315 + 278 = 593. They did not reach their goal — they were 7 cans short.
A library had 532 books. 168 were borrowed on Monday and 74 on Tuesday. How many books are still on the shelves?
290 books
I think of a number. I double it, then add 7, then subtract 3. My answer is 20. Was my starting number odd or even? How do you know?
The starting number was 8 (work backwards: 20 + 3 = 23, 23 − 7 = 16, 16 ÷ 2 = 8). 8 is even.