Powers of 10
Use an exponent to write 6 x 10 x 10 x 10 x 10 x 10 then multiply.
6 x 105 = 600,000
400 x 50 = ______
20,000
Solve.
35 x 101 = ______
35 x 102 = ______
35 x 103 = ______
35 x 101 = 350
35 x 102 = 3,500
35 x 103 = 35,000
Multiply. Estimate to show your answer is reasonable.
3,967 x 8 = ______
3,967 x 8 = 31,736
4,000 x 8 = 32,000
Reasonable? = Yes
SOLVE. Equation. Variable. Answer. Label. Show Work.
McKenzie is selling cookies for $23 per dozen. If she sells 13 dozen, how much money will she make?
23 x 13 = m
m = $299
Use an exponent to write 3.4 x 10 x 10 x 10 x 10 then multiply.
3.4 x 104 = 34,000
43 x 1,000 = ______
43,000
Solve.
763 x 101 = ______
763 x 102 = ______
763 x 103 = ______
763 x 101 = 7,630
763 x 102 = 76,300
763 x 103 = 763,000
Multiply. Estimate to show your answer is reasonable.
487 x 6 = ______
487 x 6 = 2,922
500 x 6 = 3,000
Reasonable? = yes
SOLVE. Equation. Variable. Answer. Label. Show Work.
Masato is harvesting mushrooms. Each basket holds 132 mushrooms. If he harvests 9 baskets, how many mushrooms will he harvest?
132 x 9 = h
h = 1,188 mushrooms
Write a decimal to complete the equation. Then solve. 5 x .08 = 5 x 8 x ______ = ______
5 x .08 = 5 x 8 x .01 = .40
5,000 x 8 = ______
40,000
.02 x 101 = ______
.02 x 102 = ______
.02 x 103 = ______
.02 x 101 = 0.2
.02 x 102 = 2.0
.02 x 103 = 20.0
Multiply. Estimate to show your answer is reasonable.
7.9 x 8 = ______
7.9 x 8 = 63.2
8 x 8 = 64
Reasonable? = yes
SOLVE. Equation. Variable. Answer. Label. Show Work.
Janan goes through 2.5 pencils for each of her drawings. If she draws 27 drawings, how many pencils will she need?
2.5 x 27 = j
j = 67.5 pencils
Write a decimal to complete the equation. Then solve. 2 x .009 = 2 x 9 x ______ = ______
2 x .009 = 2 x 9 x .001 = .018
300 x 0.01 = ______
3.0
.97 x 101 = ______
.97 x 102 = ______
.97 x 103 = ______
.97 x 101 = 9.7
.97 x 102 = 97.
.97 x 103 = 970.
Multiply. Estimate to show your answer is reasonable.
3.8 x 3 = ______
3.8 x 3 = 11.4
4 x 3 = 12
Reasonable? = yes
SOLVE. Equation. Variable. Answer. Label. Show Work.
Sayuri is helping to take care of her neighbor's cats. She gets paid $17.25 each day. If she feeds the cats for 7 days, how much will she earn?
17.25 x 7 = v
v = $120.75
Write a decimal to complete the equation. Then solve. 3 x .4 = 3 x 4 x ______ = ______
3 x .4 = 3 x 4 x .1 = 1.2
9.8 x .001 = ______
.0098
8.3 x 101 = ______
8.3 x 102 = ______
8.3 x 103 = ______
8.3 x 101 = 83
8.3 x 102 = 830
8.3 x 103 = 8,300
Multiply. Estimate to show your answer is reasonable.
.1 x .8 = ______
.1 x .8 = .08
0 x 1 = 0.0
Reasonable? = yes
SOLVE. Equation. Variable. Answer. Label. Show Work.
James plays Civilization 5 for 4.67 hours each day. If he plays for 8 days, how many hours will he play in all?
4.67 x 8 = c
c = 37.36 hours