Let's Make Exponents
Make an exponent
8 X 10 X 10 X 10
8 x 103
300 x 60 =
18,000
91 x 101
910
7.2 x 101
72
7,952 x 8 =
Possible Estimate
64,000
Answer
63,616
Answer
8 x 103 =
8,000
27 x 100 =
2,700
522 x 102
52,200
7.2 x 102
720
8.8 x 2.5 =
Estimate
18
Answer
22
Answer:
3.7 X 103 =
3700
When multiplying by 1000, the decimal moves three places to the right:
3.7 → 37 → 370 → 3700
60 x 0.1 =
6
91 x 103
91,000
03. x 102
30
8.2 x 0.7 =
Estimate
5.6
Answer
5.74
Make an exponent
3.7 X 10 X 10
3.7 X 102
0.07 x 10 =
0.7
522 x 101
5,220
0.3 x 103
300
A coach gives 18.6 grams of powdered drink mix to each of 8 players for their water bottles. How many grams of drink mix does the coach give in all?
Estimate:
19 x 10 = 190
18 x 8 = 144
Answer:
18.6×8 = 148.8
3.4×102 =
340
When multiplying by 100, the decimal moves two places to the right:
3.4 → 34 → 340
Mr. Clemente measured 29.7 grams of potassium chloride for each of 7 lab groups in his chemistry class. How much potassium chloride did Ms. Clemente measure in all?
207.9 grams
522 x 103
522,000
7.2 x 103
7,200
Liam works after school at a grocery store. He earns $13 per hour. How much does Liam earn if he works 24 hours in one week?
Estimate:
10 x 20 = 200
15 x 20 = 300
Answer
13×24 = $312