JSS 1 Mathematics Flashcards: Subtraction of Binary Numbers

Question 1

Evaluate $1_2-0_2$.

Accepted Answer

$1_2$

Question 2

Evaluate $1_2-1_2$.

Accepted Answer

$0_2$

Question 3

Evaluate $10_2-1_2$.

Accepted Answer

$1_2$

Question 4

Evaluate $11_2-1_2$.

Accepted Answer

$10_2$

Question 5

Evaluate $101_2-10_2$.

Accepted Answer

$11_2$

Question 6

Evaluate $110_2-11_2$.

Accepted Answer

$11_2$

Question 7

Evaluate $1000_2-1_2$.

Accepted Answer

$111_2$

Question 8

Evaluate $1010_2-11_2$.

Accepted Answer

$111_2$

Question 9

Evaluate $1101_2-101_2$.

Accepted Answer

$1000_2$

Question 10

Evaluate $1111_2-110_2$.

Accepted Answer

$1001_2$

Question 11

Evaluate $10000_2-111_2$.

Accepted Answer

$1001_2$

Question 12

When borrowing 1 from the next binary column, what value enters the current column?

Accepted Answer

$10_2$

Question 13

What binary number completes $101_2-\square=10_2$?

Accepted Answer

$11_2$

Question 14

What binary number completes $\square-11_2=101_2$?

Accepted Answer

$1000_2$

Question 15

Which subtraction equals $100_2$: $111_2-11_2$, $110_2-11_2$, $101_2-10_2$, or $1000_2-10_2$?

Accepted Answer

$111_2-11_2$

Question 16

Which result is incorrect: $10_2-1_2=1_2$, $100_2-1_2=11_2$, $101_2-1_2=100_2$, or $111_2-10_2=100_2$?

Accepted Answer

$111_2-10_2=100_2$

Question 17

How can $1100_2-101_2=111_2$ be checked in decimal?

Accepted Answer

$12-5=7$

Question 18

If a subtraction in base two gives a negative result, what does this show?

Accepted Answer

The subtrahend is greater than the minuend.

Question 19

Why are binary numerals aligned on the right before subtraction?

Accepted Answer

Digits of equal place value must share a column.

Question 20

A counter shows $111_2$ items and $10_2$ are removed. How many remain?

Accepted Answer

$101_2$

Strong work.