Equation
What is an equation? Show an example.
A math sentence that shows two things are equal.
Open ended responses for equations.
What is 20+ 40?
60
What is 10 more than 35?
45
31+5=?
36
What is 10 less than 45?
35
Make a Ten. 16+9=?
[+4] [+5]
<-------l--------l----------------l--------->
16 [ ] [ ]
20+5=25
Explanation: 16 +4= 20
9-4=5
20+5=25
What is 80-60=?
20
What is 10 more than 74?
84
23+5=?
28
What is 10 less than 92?
82
Make a Ten. 24+7=?
[+6] [+1]
<---------l-----------l-----l-------------->
24 [ ] [ ]
30+1=31
Explanation:
24 +6=30
7-6=1
30+1=31
What is 55+30=?
85
What is 10 more than 83?
93
62+7=?
69
What is 10 less than 18?
8
Make a ten. 37 + 8=?
[+3] [+5]
<-------l--------l----------------l--------->
37 [ ] [ ]
40+5=45
Explanation:
37+3=40
8-3=5
40+5=45
What is 7 tens-7 tens=?
0 tens
What is 10 more than 57?
67
54+3=?
57
Write the numbers that are 10 less and 10 more.
_______ 12 _________
2 and 22
Make a ten. 57+9=?
[+3] [+6]
<-------l----l------l--------------->
57 [ ] [ ]
60+6=66
Explanation:
57+3=60
9-3=6
60+6=66
What is 3 tens + 4 tens=?
7 tens
Bonus: 7 tens equal 70 (+100)
What is 10 more than 100?
110
97+7=?
104
BONUS (Double x2 pts):
Write the numbers that are 10 less and 10 more.
________ 105 __________
95 and 115