Powers of 10
Which is equivalent to 108? Choose all that apply.
A. 10 X 8
B. 10x10x10x10x10x10x10x10
C. 10x10x10x10x10
D. 100,000,000
E. 100,000
A.
B.
D.
Use an Area Model to solve.
42 x 13 =
546
What are partial products?
The products you get when you multiply parts of each factor.
A teacher has 24 boxes of pencils. Each box contains 12 pencils. How many pencils are there altogether? Explain your reasoning.
288
Estimate 48 × 6 by rounding 48 to the nearest ten. Explain why rounding helps.
50 x 6= 300
A square has side length of 10. Which represents the area of the square? Choose all that apply.
A. 10 X 2
B. 10 + 10 + 10 + 10
C. 102
D. 10 x 10
C.
D.
Use an Area Model to solve.
35 x 642=
22,470
Find the partial products for 23 x 4.
20 x 4= 80
3 x 4= 12
= 92
There are 36 students in a grade level. Each student receives 15 stickers. How many stickers are needed? Explain your reasoning.
540
Which is the most reasonable estimate for 39 x 582?
400 x 700
300 x 600
40 x 600
30 x 500
40 x 600
What is equivalent to 75 X 104 ?
750,000
Use an Area Model to solve.
436 x 42=
18,312
Find the partial products for 320 x 12.
300 x 10= 3,000
20 x 10= 200
0 x 10= 0
300 x 2= 600
20 x 2= 40
0 x 2= 0
Solve 126 x 32 using the standard algorithm.
4,032
Estimate 38 × 24. Explain how you decided what numbers to round.
40 x 20 = 800
Which expression has the same value as 439 x 105 ?
A. 439 x 50
B. 43,900
C. 439,000
D. 43,900,000
D.
Use an Area Model to solve.
754 x 62 = ?
A. 46,748
B. 47,267
C. 46,166
D. 46,708
A. 46,748
Use partial products to solve 461 x 25
400 x 20
60 x 20
1 x 20
400 x 5
60 x 5
1 x 5
= 11,525
A factory packs 235 boxes each day. Each box contains 32 items. How many items are packed in one day? Solve using the standard algorithm and explain why your answer is reasonable.
7,520
The school is ordering 48 boxes of pencils. Each box contains 97 pencils. About how many pencils will the school receive? Explain why your estimate is reasonable.
50 x 100= 5,000
103
A rectangle has a length of 32 and a width of 43. What is its area?
1,376
Which equation represents a partial product of 52 x 14?
A. 50 × 10
B. 52 + 14
C. 52 × 52
D. 50 + 2 + 10 + 4
A. 50 x 10
A student solves:
248 × 36 = 7,928
Is the student's answer correct? Explain why or why not.
No. the correct answer is 8,928.
Which estimate is closest to the product of 297 × 51?
A. 1,500
B. 5,000
C. 15,000
D. 20,000
C. 15,000