Directed Numbers

Hong Kong

Stage 1 - Stage 3

Let $a$`a` be a positive number and $b$`b` a negative number.

a

Will $a+a$`a`+`a` be a positive number, a negative number or zero?

Zero

A

Positive

B

Negative

C

b

Will $b+b$`b`+`b` be a positive number, a negative number or zero?

Positive

A

Zero

B

Negative

C

Easy

Less than a minute

Consider the following sentence:

$-6$−6 is added to the product of $2$2 and $-4$−4.

Consider the following sentence:

The sum of $-8$−8 and the quotient of $-40$−40 and $4$4

Consider the following sentence:

The product of $3$3 and $-6$−6 is decreased by $-9$−9.

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