Addition
Jack has 6 toy sailboats. Taylor has 5 toy sailboats. Which shows how to count on to solve the problem?
a. 5,6,7,8,9
b. 6,7,8,9,10,11
c. 6+5
d. 5+6
b. 6,7,8,9,10,11
Eli saw 4 fewer starfish than Amanda. Amanda saw 12 starfish. How many starfish did Eli see?
Draw a picture and write an equation to solve the problem.
*SHOW MS. TUZZINO*
12-4= 8
4+8= 12
What are addends of any equation?
They are numbers you are either adding or subtracting in an equation.
Choose yes or no if 9 will make the equations true
a. 9+ ____= 18 yes or no
b. 7 + _____ = 16 yes or no
c. 19-______= 10 yes or no
d. 14-3=_____ yes or no
a. yes
b. yes
c. yes
d. no
Layla has some beach balls. 3 of the beach balls blew away. Now there are 8. How many did Layla have at first? Write an equation to solve the problem.
___ +/- _____ = ______ ______ beach balls
8+3= 11
11 beach balls
Carson saw 6 whales in the ocean. Anna saw 1 more whale than Carson. Which equations show how many whales they saw in all?
a. 6+6=12
b. 6+7=13
c. 6+1=7
d. 6+6+1=13
b. 6+7=13
d. 6+6+1=13
Show how to make a 10 to find 15-8. Then complete the equation.
15-8 =
*SHOW MS. TUZZINO*
15-8=7
What is the difference of an equation? What is the sum of an equation?
The difference is the answer to a subtraction problem. The same is the answer to an addition problem.
Complete the pattern.
6+ ____ = 15
____ + 8 = 15
8 + ____ = 15
____ + _____ = 15
6+9=15
7+8= 15
8+7 = 15
9+6= 15
Sarah has 5 pairs of flip flops. She buys some more. Now she has 10 pairs. How many flip flops doe she buy?
Draw a picture and then write an equation to solve the problem.
*SHOW MS. TUZZINO*
-number line, tens frame, base ten
10-5=5
5+5=10 5 flip flops
Use the ten frame to show how to find the sum of 9+8 by making a 10. Then fill in the boxes.
SHOW YOUR WORK!
*show Ms. Tuzzino*
9 friends wanted to go surfing. They had 7 surfboards. How many more surfboards do they need? Match the equations to numbers.
a. 9-7 = 2 1. Use subtraction fact
b. 7+2=9 2. Count on.
c. 9, 8, 7, 6, 5, 4, 3, 2 3. Count Back
d. 8,9 4. Use addition fact.
a and 1
b and 4
c and 3
d and 2
What are 2 things an equation needs to make it an equation?
An equation needs an operation sign (minus, plus, division, multiplication) and an equal sign.
Which problems have a sum of 14? Choose all that apply.
a. 7 + 7
b. 10 + 4
c. 8 + 7
d. 9 + 4
a. 7+7
b. 10+4
There are 8 anchors on the ship. They threw 3 of them away. The captain bought 6 more anchors. How many anchors do they have on the ship now?
Use these numbers to complete both equations to solve the problem.
11 3 6 5
8 - ______ = _______
5 + ______ = _______ ______anchors
8 - 3 = 5
5 + 6= 11
11 anchors