Decimal x Whole #
4 x .5
2.0 or 2
.8 x .6
.48
Amir went food shopping. He bought 5 apples. Each apple cost .25 cents. How much were all the apples?
$1.25
.5 x 101
5
Estimate 89 x 1.05
Possible answers:
100 x 1.0 = 100
90 x 1.0 = 90
.25 x 8
2 or 2.0
.06 x .5
.03
Serena was painting her bedroom. Each wall required 2.7 cans of paint. How many cans does she need to paint each wall in her room?
10.8
2.8 x 103
2,800
Estimate: 178 x 2.94
Possible answer:
200 x 3 = 600
9 x .83
7.47
2.8 x .7
1.96
Rahab bought movie tickets for herself and 4 friends. If each ticket cost $5.84, how much did she pay for all of the tickets?
$29.20
4.89 x 100
4.89
Estimate: 44.8 x 15.46
Possible answers:
45 x 10 = 450
50 x 10 = 500
50 x 20 = 1,000
14 x .94
13.16
3.92 x 2.6
10.192
As a holiday gift, Mrs. Simmons bought each student in class 2 pencils. Each pencil cost .32 cents. How much did she spend on pencils if there are 24 students in class?
***Multiple steps***
$15.36
Complete the pattern:
a.) 101 x 18.563 =
b.) 102 x 18.563 =
c.) 103 x 18.563 =
d.) 104 x 18.563 =
a.)185.63
b.)1,856.3
c.)18,563 or 18,563.0
d.)185,630 or 185,630.0
Jorge ordered 22 bottles of juice. Each bottle holds 6.32 ounces of juice.
What is a good estimate of the number of ounces of juice Jorge ordered?
Possible answers:
20 x 6 = 120 ounces
20 x 5 = 100 ounces
25 x 6 = 150 ounces
25 x 5 = 125 ounces
28 x 2.79
78.12
12.3 x 2.45
30.135
Anxuan is baking for his school bake sale. In order to make one batch of brownies, he needs 2.45 cups of sugar and .78 cups of flour. How much sugar and how much flour does he need to make 6 batches?
***Multiple steps***
He needs 14.7 cups of sugar and 4.68 cups of flour.
104 x 12.567
125,670
Rounding to the nearest tenth, which of the following give an overestimate? Why?
Choose all that apply.
When you round up or above the original number, it is an overestimate.