2nd Grade Addition/Subtraction
Solve 125 +20
145
What is the value of the 5 in 594??
500
What is the name of the measuring tool used to measure small objects?
A ruler.
What is the name of the shape that has 3 sides and 3 angles.
A triangle
A bakery has 14 muffins. The baker makes 21 more muffins. How many muffins are there in all?
35 muffins
Solve 19+34
53
What is the value of 9 in the number 902?
900
Which two units can be used to measure the length of a hamster?
inches and centimeters
How many corners does a circle have?
0
Kelly has 53 magnets. Then she gives 27 to her sister. How many magnets does Kelly have now?
26 magnets
Solve 320-123
197
What are the names of the place value blocks used to represent the ones, tens, and hundreds?
-ones ( units)
- tens (rods)
-hundreds (flats)
Would you use centimeters or inches to measure a pencil eraser?
centimeter
What is a parallel line?
Lines that won't ever touch or cross
Fred has 104 marbles. He gives 32 away. How many does he have left??
72 marbles
Unbundle/ Do not unbundle?
125-89
unbundle
What is the value of 2 in 123?
20, 2 tens
What unit is about the size of your elbow to your wrist?
feet
How many sides does a quadrilateral have?
4 sides
There were 11 birds on a tree. Then 3 of the birds flew away. How many birds are left on the tree?
What is the keyword(s) that help you decide what operation to use?
left
Solve 78+ 15 using a place value chart and also using the vertical method
93
Explain the rule for how to know if you will need to unbundle a ten to solve a subtraction problem?
If the larger number is on top, no need to stop! If there is a larger number in the ones place on the bottom, you need to unbundle to have more ones to subtract.
How many feet are in a yard?
3 feet
Draw 3 different polygons that each have at least one square corner on your whiteboard. Label each shape and make sure that each shape has a different name.
Check their work! A square corner is the same thing as a right angle!
28 trucks are blue. 32 trucks are yellow 17 trucks are green. 11 trucks are pink. How many trucks are there in all?
88 trucks