Making a 10
8+4=
8+2=10
4=2+2
10+2=12
8+4=12
3+4=
3+3=6
6+1=7
3+4=7
22+31=
22+31=?
ll** + lll*
lllll + ***
50+3=53 22+31=53
What is another way to write the equation 1+82=?
82+1=83
7+6=
7+6=
7+3=10
6=3+3
10+3=13
7+6=13
8+9=
8+9=
8+8=16
16+1=17
8+9=17
52+17=
lllll**+l*******
llllll+*********
60+9=69 52+17=69
Write the equation 76+19=? in another way.
19+76=?
Which would you use to make a ten for the following equation: 3+8=
2+6 4+4
1+7 3+5
1+7
3+8=
3+7=10
8=1+7
10+1=11
3+8=11
4+6=
4+6=
4+4=8
8+2=10
4+6=10
36+40=
36+40=
lll******+llll=
lllllll+******
70+6=76 36+40=76
Is the solution different for the following equations? Explain why.
65+25=
25+65=
No, addends can be added in any order.
Which would you use to make a ten for the following equation: 5+9=
3+6 4+5
1+8 2+7
5+9=
5+5=10
9=5+4
10+4=14
5+9=14
What doubles fact would I use for the equation 5+7=?
7+7 8+8
5+5 3+3
5+5
5+5=10
10+2=12
5+7=12
82+12=
82+12=
llllllll** + l**
lllllllll + ****
90+4=94 82+12=94
Tom has 19 apples. Jerry has 23 oranges. How many pieces of fruit is there in all?
Jenn says 19+23 is the equation you use to solve.
Jess says 23+19 is the equation you use to solve.
Who is correct? Jenn or Jess?
They are both correct. You can add addends in any order and the sum is the same.
Write the equation for the word problem and solve using the 'make a 10' strategy.
Ms. Fisher has 6 pieces of pizza. Mrs. Hamel has 8 tacos. How many snacks does Ms. Fisher and Mrs. Hamel have in all?
6+8=
6+4=10
8=4+4
10+4=14
6+8=14
How do you know if an equation is a doubles +1 or a doubles +2?
If one of the addends is only one or two values greater.
Ex. 4 and 5 or 4 and 6, etc.
12+88=
12+88=
l** + llllllll********
lllllllll + **********
90+10=100 12+88=100
Write two equation that have the sum of 50.
Answers may vary. Students should write 2 equations with the same addends but in different order.