Practice It
Annex Zeros
Problem Solving
Brain Builders
Who Am I?
100
9.14 + 2.05
11.19
100
0.54 + 7.8
8.34
100
Horacio bought a logic puzzle and batteries from a toy store. Use the table at the right to find the total cost of the two items, not including tax.
$14.95 + $10.39 = $25.34
100
Tell me a real-world problem word problem that can be solved by adding 1.99 and 2.49. Then find the answer.
The answer is 4.48 or $4.48.
100
I am worth more than 1 1/2.
If you round me to the nearest whole, I round up.
If you double me, I'm less than 4.
My hundredths digit is even.
1.67, 1.08, 1.54, 2.16
1.54
200
19 + 11.03
30.03
200
14.8 + 10.26
25.06
200
An athlete training for the Olympics swims each lap of a four-lap race in the following times: 54.73, 54.56, 54.32, and 54.54 seconds. What is the total time it takes her to swim the four laps?
54.73 + 54.56 + 54.32 + 54.54 = 218.15 seconds
How many minutes is this?
200
What are two decimals that when added equal 1?
Answers will vary.
200
If you double me, I am less than 3.
I have an odd number of tenths.
If you round me to the nearest whole, I round down.
If you multiply me by ten, you get a whole number.
1.67, 1.3, 1.08, 2.43
1.3
300
3.08 + 1.64
4.72
300
25 + 8.46
33.46
300
Terrance is bicycling on a trail. He bicycles for 12.6 miles and takes a break. Then he bicycles for 10.7 miles. How many miles has Terrance bicycled in all?
12.6 + 10.7 = 23.3 miles
300
What is a pair of decimals that equal 8.69?
Answers will vary.
300
____. ____ ____
My tenths digit is twice my hundredths.
My ones digit is equal to the sum of my tenths and hundredths digit.
My hundredths digit is even and greater than zero.
6.42
400
8.9 + 15 = x
x = 23.9
400
35.08 + 11.9
46.98
400
I am a two-digit number less than one whole.
My hundredths place is 1/4 of my tenths place.
My hundredths place is the smallest prime number.
0.82
500
42.2 + 7.69 = d
d = 49.89
500
0.8 + 0.22
1.02