Doubles
Which of these is a doubles facts
A. 5+5
B. 7+5
C.1+2
A. 5+5
When you solve a story problem, what is the first thing you do?
Circle the numbers, check the sign, look for key words!
Related facts are math facts that use the same numbers, for example 5+4=9 and 9-5=4 use the same numbers so they are called related facts. Which of these are also related facts?
A. 8+7=15 and 15-9=6
B.4+2=6 and 6-6=0
C. 8+4=12 and 12-4=8
C. 8+4=12 and 12-4=8
Draw a solution for this problem: 5+6
Varies
(Class) What kind of a problem gives you a sum?
Addition
Solve this double fact: 8+8=
16
While looking at a story problem you see it has these words.
Altogether, plus, more, combine, total, and sum.
What type of problem uses these words?
Addition
How can we show related facts?
Bar model
Write a subtraction equation using 12 and 6. Solve it
12-6=6
(Class) What kind of problem gives you a difference
subtraction
write a doubles fact to solve this problem
8+7
8+8
or
7+7
While looking at a story problem, you see it has these words.
Minus, how many more, how many fewer, has only, left, and difference.
What type of problem uses these words?
Subtraction
Write two related fact using 7, 5, and 12
7+5=12
5+7=12
12-7=5
12-5=7
Write an addition equation using 4 and 9. Solve it!
4+9=13
9+4=13
(Class)Find the sum of these numbers. 9, 5
14
Decide if you need 1 more or 1 less then the double sum!
Fact: 3+2 = __
Doubles fact : 3+3=6
Does the doubles fact need 1 more or 1 less then to get to the correct answer?
1 Less
Solve: Haliey has 8 pokemon cards. Edward gives her 3 more. How many pokemon cards does Haliey have all together.
11
Solve
___=3+7
7+3=___
10
Write a doubles fact for this equation, 4+3
4+4=8
3+3=6
(Class)Find the difference of these numbers. 14, 9
5
Decide if you need 1 more or 1 less then the double sum!
Fact: 8+9 = __
Doubles fact : 8+8=16
Does the doubles fact need 1 more or 1 less then to get to the correct answer?
1 more
Solve: Kya has 12 cookies. She gives 5 cookies to Douglas. How many cookies does Kya have left
7
Use the sum of these numbers to write a related fact
3 and 4
3+4=7
4+3=7
7-4=3
7-3=4
Write an equation for the problem on the board
*Teacher Draws*
xxxxxx + <<<<<
6+5=11
5+6=11
(Class) Solve: 8+6=
Solve: 16-7=
14
9