Math

Place Value Power

100

1000+500+30+2 is written in expanded form.

Write 1000+500+30+2 as one number.

1,530

200

Imagine we were using base 10 blocks. 

What number has 6 thousands, 2 hundreds, 0 tens, and 9 ones?

6,209

6 cubes, 2 flats, no rods, 9 units 

300

I am a four-digit number. My thousands digit is 5. My hundreds digit is 3 more than my tens digit. My tens digit is 2, and my ones digit is 0. What am I?

5520

400

A number has 48 hundreds and 12 ones. What is the number?

4,812

500

In 7,272, how many times greater is the value of the first 7 (in the thousands place) than the second 7 (in the tens place)?

100 times greater.

1. Find the place value of each 7 in 7,272:

• The first 7 is in the thousands place
• The second 7 is in the tens place:

2. Compare the two values using division:

• Divide the value of the first 7 by the value of the second 7
• because our first 7 is in the thousands place we know this is 7000
• our second 7 is in the tens place we know this is 70. 

• so we divide 7000/ 70 = 100

Round It Up

100

Which multiple of 10 is closer to 64: 60 or 70?

60

200

Round 758 to the nearest 10.

760

300

Round 2,495 to the nearest 10 and nearest 100.

10s: 2500

100s: 2500

400

A student rounds 4,549 to 4,600 to the nearest 100. Is this correct?

no, the nearest 100 is 4500

500

I am thinking of a number... when rounded to the nearest 100 it is 4,300. when rounded to the nearest 10 it is 4,280

Give one possible number. There are multiple answers.

Any whole number from 4,275 to 4,284, such as 

4,281

4,280

Operation Station

100

What is 90 − 30?

60 

200

What is 125 + 75?

200

300

Find the missing number: 35 + □ = 92.

57

92-35=57

35+57=92

400

A student says 7 × 16 = 7 × 10 + 7 × 6. What is the answer?

112

7*16=112

7*10=70

7*6= 42

70+42=112

500

I am a number. Multiply me by 5 and then subtract 15. The answer is 85. What number am I?

20

1. 15+85 = 100

2. 100/5= 20 

3. redo the math

4. 20*5=100 

5. 100-15=85

Math in the wild

100

You see 4 ravens in a tree. Then 3 more land. How many ravens are there?

7 ravens 

200

You buy a notebook for $7.00 and pay with $10.00 How much change do you get?

$3.00

300

A hiking trail is 850 metres long. You have walked 375 metres. How much farther is left?

475meters left.

400

A class needs 6 pieces of yarn for each of 24 students. How many pieces are needed?

144 pieces of yarn

6*24=144

500

A school has $500 for supplies. It buys 4 sets of markers at $35 each and 3 packs of paper at $25 each. How much money remains?

$285.00

Math Vocabulary

100

What is the NAME for the answer to 

1. an addition problem?

2. a subtraction problem? and 

3. a multiplication problem?

1. sum

2. difference

3. product

200

What word means to make a sensible, close guess about an amount?

estimate 

300

What do we call writing a number as the sum of its place values, such as ...

3,000 + 200 + 40 + 5?

expanded form

400

What mathematical word means to break a number into smaller parts?

decompose 

500

What do we call a mathematical statement showing that two expressions have the same value?

Equation