Question

Find each of the following products:

i) (-65) x (-10) x 9 x (-1)
ii) (-20) x (-2) x (-3) x (5)

iii) (-12) x 0 x (-56)
iv) (-654) x 1

v) (-1) x (-2) x (-3) x (-4)

class 7 Questions Maths
please answer of me question 7 also please
answer me this question also ​

Answer 1

Answer:

Dead burnt plaster is anhydrous calcium sulphate CaSO4. It is known as dead burnt because, when moistened with water it does not set like plaster of Paris. When plaster of Paris is heated above 393 K its water of crystallization is lost and the leftover anhydrous calcium sulphate CaSO4 is called the dead burnt plaster.

Answer 2

Answer:

1)-5850

2)-600

3 0

4) -654

5)24

Step-by-step explanation:

1) -65×-10 = 650

650×9×-1 = -5850

2) -20×-2 = 40

40×-3 = -120

-120×5 = -600

3) any number multiplied with 0 gives 0

4) any number multiplied with 1 gives same number

5) -1×-2×-3×-4 = (-1)^4.24 = 24