Sums and Differences to 100
Finish the fact family:
8+2=
2+8=
10-2=
10-8=
8+2=10
2+8=10
10-2=8
10-8=2
How many centimeters are in one meter?
There are 100 centimeters in one meter.
How many ones make a ten?
How many tens make a hundred?
How many hundreds make a thousand?
10 ones make a ten.
10 tens make a hundred.
10 hundreds make a thousand.
26+35
61
What is an array?
An array is a way to arrange objects into equal columns and rows.
What do you call the amount of space an object takes up?
Area
What is the answer to both equations:
16+3=
13+6=
19
Which would you use to measure a school bus: meters or centimeters?
You would use meters to measure a school bus.
Write this number in expanded form:
685
600+80+5
432 - 168
264
What is 3+3+3+3+3?
Bonus: How can you write this as a multiplication equation?
Bonus: 3x5=15
Write an example of an odd number.
Write an example of an even number.
Odd number should end in 1, 3, 5, 7, or 9.
Even number should end in 2, 4, 6, 8, or 0.
There were 28 students at recess. A group of 7 students came outside to join them. How many students are there now?
There are 35 students
With one push, Brian’s toy car traveled 40 centimeters across the rug. When pushed across a hardwood floor, it traveled 95 centimeters. How many more centimeters did the car travel on the hardwood floor than across the rug?
The car traveled 55 more centimeters on the hardwood floor than across the rug.
Fill in the blank:
170, 180, 190, ____, 210, 220, 230
47+115
162
How do rows go?
How do columns go?
Rows go side to side.
Columns go up and down.
You have four dimes and one nickel. How much money do you have?
You have 45 cents.
Emma has 16 markers. She gave Jack some. Seven markers are left. How many markers did Emma give Jack?
Emma gave Jack 9 markers.
Richard’s sunflower is 9 centimeters shorter than Oscar’s. Richard’s sunflower is 75 centimeters tall. How tall is Oscar’s sunflower?
Oscar's sunflower is 84 centimeters.
Write the number in standard form:
4 ones
5 hundreds
7 tens
574
817-565
252
There are 16 books. The bookcase has 4 shelves. How many books can go on each shelf for each shelf to have the same amount?
4 books can go on each shelf.
The hour hand is on 3. The minute hand is also on 3. What time is it?
3:15
What do you call the answer to an addition problem?
What do you call the answer to a subtraction problem?
Steven has a black leather strip that is 13 centimeters long. He cut off 5 centimeters. His teacher gave him a brown leather strip that is 16 centimeters long. What is the total length of both strips?
The total length of both strips are 24 centimeters.
Put the following in order from least to greatest:
613
9 tens 5 ones
3 + 800 + 50
four hundred twenty nine
9 tens 5 ones
four hundred twenty nine
613
3 + 800 + 50
907-467
440
Draw an array with 20 x's.
xxxx
xxxx
xxxx
xxxx
xxxx
How many sides does a hexagon have?
A hexagon has six sides.