Question

Simplify the following:

(1) Subtract (−5) from 5.

(2) How much should be subtracted from (+5) to get −7?

(3) By how much (−10) exceeds (−20).

(4) From what number should (+10) be subtracted to get −15?

(5) What must be added to +7 to get −10?

(6) What should be added to +10 to get −4?

(7) If then, fill up the gap.

(8) If then fill up the gap.

(9) . Find the difference and show the operation by drawing a number line.

(10) Subtract −100 from the sum of −30 and +30.

Answer 1

(1)

(2) Let the number subtracted be .

Thus, 12 should be subtracted from (+5) to get −7.

(3)

Thus, (−10) exceeds (−20) by 10.

(4) Let the number subtracted be .

(5) Let the number added be .

(6) Let the number added be .

(7)

(8)

(9)

The difference is 2.

(10)