Recall

Author:NCERT
7th CBSE
IMPORTANT

Important Questions on Recall

MEDIUM
IMPORTANT

Science Application: An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge of -1  Remember number of electrons is equal to number of protons, while answering these questions:

What will be the charge on an atom if it loses an electron?

MEDIUM
IMPORTANT

11×-5=-_____×_____=_____.

HARD
IMPORTANT

-8+_____+______=_______+-3+_____=-3

MEDIUM
IMPORTANT

Science Application: An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge of -1  Remember number of electrons is equal to number of protons, while answering these questions:

What will be the charge on an atom if it gains an electron?

MEDIUM
IMPORTANT

The table given below shows the elevations relative to sea level of four Locations.
Taking sea level as zero, answer the following questions:

LocationElevation(inm)A-180B1600C-55D3200

Which location is farthest from sea level?

MEDIUM
IMPORTANT

The table given below shows the elevations relative to sea level of four Locations.
Taking sea level as zero, answer the following questions:

LocationElevation(in m)A-180B1600C-55D3200

Which location is closest to sea level?

MEDIUM
IMPORTANT

Write a pair of integers whose product is -12 and there lies seven integers between them (excluding the given integers).

MEDIUM
IMPORTANT

Science Application: An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge of -1  Remember number of electrons is equal to number of protons, while answering these questions:

What is the charge on an atom?

EASY
IMPORTANT

_____ is the multiplicative identity for integers.

MEDIUM
IMPORTANT

If we multiply five positive integers and one negative integer, then the resulting integer is _____. (Negative / Positive)

MEDIUM
IMPORTANT

If we multiply six negative integers and six positive integers, then the resulting integer is _____.

EASY
IMPORTANT

If we multiply _____ number of negative integers, then the resulting integer is positive. even / odd

EASY
IMPORTANT

-23×42=-42×_____.

 

EASY
IMPORTANT

-9×20=_____.

EASY
IMPORTANT

-8+-8+-8=_____×-8.

EASY
IMPORTANT

-43+_____=-43.

EASY
IMPORTANT

On the following number line, -4×3 is represented by the point _____.

Question Image          

EASY
IMPORTANT

-157×-19+157=_____.

EASY
IMPORTANT

_____ ÷-10=0

MEDIUM
IMPORTANT

-a+b=b+ Additive inverse of _____.