ACARA Digital Technologies Years 7–8 Crossword: Binary Number Representation (Modules 189–203)
Name:
Date:
Class:
✎
Crossword
Read each clue and write the matching term in the grid. Numbers in brackets show the letters in each word.
1
2
3
4
5
6
7
8
9
10
Across
- 5. Word 2 of the term in 4 Down: ______ __________ _______ (10)
- 6. Word 3 of the term in 4 Down: ______ __________ _______ (7)
- 7. The leftmost ______ of a binary number. It has the biggest place value, so it changes the number the ______. The rightmost ______ is the least significant ______. Word 3 of: ____ significant ___ (3)
- 9. ______ changes a binary number into its decimal value. ______ gives 13. Use it to check a hand conversion. Word 1 of: =_______(1101) (7)
- 10. Word 1 of the term in 7 Across: ____ significant ___ (4)
Down
- 1. A spreadsheet function that converts a decimal whole number into binary text. ______ gives 1101. Add places to pad with zeros, e.g. =______(5,8) gives 00000101. Word 1 of: =_______(13) (7)
- 2. Check a decimal to binary answer by reading the binary back into decimal, adding the place values, and comparing with the starting number. If they match, it is right. Word 1 of: _______ back (7)
- 3. Two states (on or off) are easy to tell apart even when signals are weak or noisy. Ten voltage levels would be easy to confuse, so binary makes errors less likely. Word 2 of: ______ ___________ (11)
- 4. A slip such as reversing place values, dropping a zero, reading remainders top to bottom or using a 2. ______ only uses 0 and 1, and remainders are read bottom to top. Word 1 of: ______ __________ _______ (6)
- 8. Divide a number by 2 again and again until the quotient is 0, noting each remainder. Read the remainders from last to first to get the binary number. Example: 13 is 1101. Word 1 of: ________ division by 2 (8)
Answer Key
ACARA Digital Technologies Years 7–8 · Modules 189–203
1D
2C
E
3R
4B
O
5C
O
N
V
E
R
S
I
O
N
2
L
N
V
B
6M
I
S
T
A
K
E
I
A
R
R
N
B
Y
T
7B
I
T
L
8R
9B
I
N
2
D
E
C
T
P
Y
E
A
10M
O
S
T
E
D
Across
5CONVERSION — Word 2 of the term in 4 Down: ______ __________ _______
6MISTAKE — Word 3 of the term in 4 Down: ______ __________ _______
7BIT — The leftmost ______ of a binary number. It has the biggest place value, so it changes the number the ______. The rightmost ______ is the least significant ______. Word 3 of: ____ significant ___
9BIN2DEC — ______ changes a binary number into its decimal value. ______ gives 13. Use it to check a hand conversion. Word 1 of: =_______(1101)
10MOST — Word 1 of the term in 7 Across: ____ significant ___
Down
1DEC2BIN — A spreadsheet function that converts a decimal whole number into binary text. ______ gives 1101. Add places to pad with zeros, e.g. =______(5,8) gives 00000101. Word 1 of: =_______(13)
2CONVERT — Check a decimal to binary answer by reading the binary back into decimal, adding the place values, and comparing with the starting number. If they match, it is right. Word 1 of: _______ back
3RELIABILITY — Two states (on or off) are easy to tell apart even when signals are weak or noisy. Ten voltage levels would be easy to confuse, so binary makes errors less likely. Word 2 of: ______ ___________
4BINARY — A slip such as reversing place values, dropping a zero, reading remainders top to bottom or using a 2. ______ only uses 0 and 1, and remainders are read bottom to top. Word 1 of: ______ __________ _______
8REPEATED — Divide a number by 2 again and again until the quotient is 0, noting each remainder. Read the remainders from last to first to get the binary number. Example: 13 is 1101. Word 1 of: ________ division by 2