Multiplication
with Area Models
Multiplying by
Powers of 10
Multiplying Whole Numbers
Multiplying Decimals
Word Problems
100
Solve 24 x 36 using area model.
What is 864.
100
Multiply 1.76 x 100. What direction does the decimal move? How many spaces does it move?
What is 176. The decimal moves to the right. It moves 2 spaces to the right because there are two zeros.
100
Solve 51 x 42 using standard algorithm or partial products.
What is 2,142.
100
Solve 0.2 x 0.11.
What is 0.022.
100
The school is ordering lunch for 42 students 3 teachers. Each lunch costs $12. How much will the school spend in total?
What is $540.
200
Solve 145 x 23 using area model.
What is 3,335.
200
Solve 0.03 x 10^4. What direction does the decimal move? How many spaces does it move?
What is 300. The decimal moves to the right. It moves 4 spaces to the right because the exponent is 4.
200
Solve 58 x 45 using standard algorithm or partial products.
What is 2,610.
200
Solve 0.23 x 0.47.
What is 0.1081.
200
An area of 42 square meters is needed in order to have room for all students to watch a movie. The school cafeteria is a rectangle that measures 22.7 meters by 1.8 meters. Kim estimated the area to be 23 x 2 meters, and said that the cafeteria could be used because the estimated area is 46. Kim's teacher says the cafeteria is not large enough. Who is correct and why? Solve 22.7 x 1.8 to find the actual area of the cafeteria.
What is Kim's teacher because the actual area of the cafeteria is 40.86. Kim overestimated, so 46 is larger than 40.86. There is not enough room in the cafeteria.
300
Solve 167 x 213 using area model.
What is 35,571.
300
Solve 21.345 x 0.001. What direction does the decimal move? How many spaces does it move?
What is 0.021345. The decimal moves to the left. It moves 3 spaces to the left because there are 3 zeros.
300
Solve 256 x 87 using standard algorithm or partial products.
What is 22,272.
300
Solve 1.34 x 0.54.
What is 0.7236.
300
62 students ordered lunch. Half the students ordered plain pizza that cost 22 cents a slice. The other half ordered pepperoni pizza that cost 32 cents a slice. How Much money did the students spend in all? Be able to explain your answer.
What is $16.74.
400
Solve 0.14 x 0.3 using area model.
What is 0.042.
400
What number is represented by 8.3 x 10^6? What direction does the decimal move? How many spaces does it move?
What is 8,300,000. The decimal moves to the right. It moves 6 spaces to the right because the exponent is 6.
400
Solve 156 x 243 using standard algorithm or partial products.
What is 37, 908.
400
Solve 2.41 x 1.4.
What is 3.374.
400
275 students are building with Legos. 40 Legos are given to each student. Legos come in containers of 100. How many containers of Legos will the teachers need to buy so that each student can have 40 Legos?
What is 110 containers.
500
Solve 0.25 x 0.46 using area model.
What is 0.115.
500
Which answer is equal to 1,345,000 a. 0.1345 x 10^6 c. 13.45 x 10^6 b. 1.345 x 10^6 d. 134.5 x 10^6
What is b. 1.345 x 10^6
500
Solve 364 x 421 using standard algorithm or partial products.
What is 153,244.
500
Solve 21.34 x 4.3.
What is 91.762.
500
1245 students need 22 pencils each for the school year. How many total pencils are needed so that each student gets 22 pencils?
What is 27,390 pencils.
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