Base Ten Strategy
Solve the expression.
76-53=
23 (base ten strategy used correctly on whiteboard)
1 + 2
3
There were 18 people in line for the roller coaster. Then some more people joined the line. Now there are 27 people waiting. How many people joined the line?
9 people (base ten used correctly)
? + 21= 52
Should you add or subtract to solve this equation?
Subtract
Solve the expression.
41-25=
16 (base ten strategy used correctly on whiteboard)
3 - 1=
2
Some ice cream cones were on the counter. The clerk made 23 more cones, and now there are 74 cones. How many cones were there at first?
51 cones (base ten used correctly)
If you are missing the whole, you should...? (how do you solve?)
Add
Solve the expression.
26+66=
92 (base ten strategy used correctly on whiteboard)
1
There were 31 dogs in the park. Then some more dogs arrived for the puppy parade. Now, there are 68 dogs. How many dogs arrived?
37 dogs (base ten used correctly)
Subtract
Solve for the missing number.
? + 34= 78
44 (base ten strategy used correctly on whiteboard)
0 + 0=
0
Rumi has some bags of chips. She her friends 23 bags of chips. Now she has 19 bags left. How many bags did she have to begin with?
42 bags of chips (base ten solved correctly)
If you are missing a part you should...? (how do you solve?)
Subtract!
Solve for the missing number.
29 + ?= 55
26 (base ten strategy used correctly on whiteboard)
1 + 1=
2
There are 81 Skittles in a jar. Shrek shares 14 Skittles with Donkey. How many Skittles does Shrek have now?
67 Skittles (base ten used correctly)
10 ones