Topic A
Compose & Decompose
Units of Ten
Compose & Decompose
Units of Ten
Decompose the number 43 into tens and ones.
4 tens, 3 ones
Use number bonds to answer: 12x5
10x5=50
2x5=10
50+10 = 60
Use number bonds to answer: 35 divided by 5.
30 divided by 5 = 6
5 divided by 5 = 1
6+1=7
What is area? Give the formula for finding area.
Area is the inside measurement of a space.
A=LxW
What are the first 5 multiples of 3?
3, 6, 9, 12, 15
Decompose the number 115 into hundreds, tens and ones.
1 hundred, 1 ten, 5 ones
Use number bonds to answer: 764x3
700x3= 2,100
60x3=180
4x3=12
2,100+180+12=2,292
Use number bonds to answer: 248 divided by 8
240 divided by 8= 30
8 divided by 8=1
30+1=31
What is perimeter? Give the formula.
Perimeter is the outside measurement of a space.
P=L+L=W+W
What are the first 3 multiples of 12?
12, 24, 36
Decompose 423 into tens and ones.
42 tens, 3 ones
Draw an area model to answer: 34x6
204
Draw an area model to answer: 73 divided by 3
24
Find the area of a space with a length of 5 inches and a width of 2 inches.
10 inches.
What is the definition of a prime number? Give an example.
A prime number is a number whose only factor pairs are 1 and itself. For example: 13 is a prime number.
Decompose the number 246 and divide it by 6.
24 tens divided by 6 = 4 tens
6 ones divided by 6 = 1 one
246 divided by 6 is 41.
Use the distributive property to solve: 45x7
315
Use the distributive property to answer: 304 divided by 4
76
Find the perimeter of a space with a length of 25 feet and a width of 9 feet.
68 feet
What is the definition of a composite number? Give an example.
A composite number has multiple factor pairs. For example: 12 is a composite number.
Decompose the number 567 and divide it by 7.
56 tens divided by 7 is 8 tens
7 ones divided by 7 is 1 one
567 divided by 7 is 81.
Use place value to solve: 47x5
235
Use place value to solve: 115 divided by 5.
23
Beckham is creating a square garden. The area of his garden is 25 square feet. What is the length and width of his garden.
5 feet each length and width
List all the factors of the number 36.
1x36, 2x18, 3x12, 4x9, 6x6