Problem Solving
Shannon traded 6 pickles for dimes. How many dimes did Shannon receive?
3 dimes
Alex has 8 dimes in his pocket. A dime is worth 10 cents. Write an expression that represents how many cents Alex has in his pocket. How much money does he have
8 x 10= 80
2 x 6=
2 x 8=
2 x 6=12
2 x 8=16
what is commutable property
5 x 10= 10 x 5
Remember that you can use the Commutative Property of Multiplication to multiply 2 factors in any order.
5 × 9 =
0 × 6 =
10 × 3 =
8 × 1 =
5 × 9 = 45
0 × 6 =0
10 × 3 =30
8 × 1 =8
Greg bikes 9 miles and swims 4 miles each week. He multiplied 5 x 10 to find how many more miles he bikes than swam in the last 10 weeks. Does that make sense? why?
Yes; Greg bikes 5 more miles each week than he swims. In 10 weeks he biked 5 x 10 miles more than he swam.
Zach arranges his quarters into 6 rows and 5 columns. David arranges his quarters into 5 rows and 6 columns. Who has more quarters? Explain
They have the same number of quarters because of the commutative property 6
6 x 5= 5 x 6
10 x 7=
10 x 9=
10 x 5=
10 x 7= 70
10 x 9= 90
10 x 5= 50
show a equal group of array
equal groups
A building has 9 rows of mailboxes. There are 6 mailboxes in each row. Write and solve an equation to find the total number of mailboxes.
9 x 6=54
Robb has 35 red counters and 39 yellow counters. He gives his sister 18 red counters. How many counters does he have left?
56 counters
35+39=74
74-18=56
Use the expression 10 × ? where ? represents a factor between 1 and 9. What is true about the digit in the ones place of each product? Explain.
10 x 2= 20
10 x 3 =30
10 x 4= 40
10 x 5= 50
10 x 6= 60
10 x 7=70
6 x 2=
6 x 5=
6 x 9=
6 x 10=
6 x 2=12
6 x 5= 30
6 x 9=54
6 x 10=60
Write T for true or F for false.
Skip count by 4s. The number 14 is a multiple of 4.
F
James told Lilly he baked 15 muffins on a rectangular pan. Which sentence could Lilly use to describe how the muffins were baked
James baked 5 rows of 3 muffins
axson has 50 daisies to plant in window boxes. Each window box holds 10 flowers. How many window boxes does he need to buy? Explain how you found your answer.
I can use 10s factors to solve the problem.
5 x 10=50
so Jaxson needs 5 window boxes
Dawn has 2 bananas. She cuts each banana into 8 slices. Write and solve an equation to find the number of banana slices that Dawn has
2 x 8=16
7 x 2=
7 x 3=
7 x 4=
7 x 5=
7 x 6=
7 x 7=
7 x 2=14
7 x 3=21
7 x 4=28
7 x 5=35
7 x 6=42
7 x 7=49
Write T for true or F for false.
The Identity Property says that any number times 1 equals the number itself
T
A beaded bracelet has 3 different colored beads that make a pattern. The pattern repeats 10 times. Write and solve an equation to find the number of beads.
10 x 3=30
there are 30 beads
Elena has 4 jewelry boxes. She keeps 5 necklaces in each box. How many necklaces does Elena have? Use a bar diagram to represent the problem.
20 necklaces
Isabella has $45 to spend on shirts. All shirts in the store are on sale for $5 each. How many shirts can Isabella buy? Explain how you found your answer
I can use 5s facts to solve the problem. 9 x 5 = 45
so Isabella can buy 9 shirts
5 x 9=
10 x 3=
7 x 2=
2 x 5=
5 x 9 =45
10 x 3 = 30
7 x 2 =14
2 x 5 =10
Write T for true or F for false.
A bar diagram can be used to show 3 × 6.
Tara arranges her dimes into 4 rows and 9 columns. Morgan arranges her dimes into 9 rows and 4 columns. Who has more dimes? Explain
They have the same number of dimes because of commutative property
4 x 9= 9x 4