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1 +1
2=4
1 =—
1 + 8—
—
+ 9876. 5 4 3&2 1 = ?
—
=
6
8
?
8 ✹ 0 . 5 = 0.50 = 0 . 5 0 0 ✹ 123.4 5 6 7 8 9Reading
3—
✹
2 4 —
2
Writing Decimals
Stumpers
Challenge students with these weekly decimal problems.
LEARNING OBJECTIVE
Directions
Students use logical reasoning
and knowledge of place value to
solve number puzzles.
1. Review decimal place value.
Tens
Ones
Decimal
Point
Tenths
Hundredths
2
1
.
4
5
3
7
.
0
8
5
.
6
GROUPING
Whole class
MATERIALS
Go over how each decimal is read and written:
We say, “Twenty-one and forty-five hundredths.”
We write 21.45.
We say, “Thirty-seven and eight hundredths.”
We write 37.08.
We say, “Five and six tenths.”
We write 5.6.
✹ Stumpers reproducible (p. 96)
✹ construction paper
✹ scissors
✹ glue
✹ paper and pencil
2. Students use the clues in each problem to find the mystery number.
ADVANCE PREPARATION
3. They write the answers using both numbers and words. For instance,
13.97 is also written as thirteen and ninety-seven hundredths.
Duplicate one Stumpers
reproducible. Cut along lines.
Attach each problem to
construction paper and display
weekly in your math learning
center or on the bulletin board.
Taking It Further
Students may enjoy making their own decimal problems to stump
classmates. Place the new Stumpers in your learning center.
Assessing Skills
Are students writing six tenths as 0.06 or as 0.6? Many students
incorrectly reason that since tens are two places to the left of the
decimal, tenths must be two places to the right of the decimal.
Answers
Page 96:
1. 37.51 2. 55.93 3. 26.84
4. 42.24 5. 8.24 6. 11.37
The Great BIG Book of Funtastic Math © Scholastic Teaching Resources
95
Name
Date
Stumpers
Write your answers on a separate piece of paper in both number and word form; for
example, 14.37 (number form), fourteen and thirty-seven hundredths (word form).
1.
a.
b.
c.
d.
e.
Who Am I?
I have 4 digits, and they all are different.
All of my digits are odd.
I have a 1 in the hundredths place.
I have a 7 in the ones place.
The number in the tens place is less than
the number in the tenths place.
f. None of my digits are 9.
Who Am I?
I have 4 digits.
Each digit is either a 2 or a 4.
The numbers in the ones place and
tenths place are the same.
d. The numbers in the tens place and
hundredths place are the same.
e. I have a 4 in the hundredths place.
2. Who Am I?
a. I have 4 digits, and they are all odd.
b. The number in the tenths place is
greater than 3. It is a factor of 36.
c. The number in the hundredths place is
less than 4 and greater than 1.
d. The numbers in the ones and tens places
are the same and are also factors of 25.
5. Who Am I?
a. I have 3 even digits.
b. The number in the tenths place when
subtracted from 3 equals 1.
c. The number in the ones place is 8.
d. Divide the number in the ones place by
2 and you will have the number in the
hundredths place.
3. Who Am I?
a. I have 4 digits, and they are all different
and even.
b. The number in the hundredths place is
half of the number in the tenths place.
c. The number in the hundredths place is
greater than 3.
d. The number in the ones place is 6.
e. The number in the tens place is 2.
6. Who Am I?
a. I have 4 digits, and they are all odd.
b. The 2-digit whole number is greater
than 10 and less than 20. When this
number is divided into 121, the quotient
is also that number.
c. The digit in the tenths place is 3.
d. Add 4 to the number in the tenths place
and you will have the number in the
hundredths place.
96
4.
a.
b.
c.
The Great BIG Book of Funtastic Math © Scholastic Teaching Resources