Fill in the blanks with integers. (a) 5 × ___ - 8 = 37: Class 7

Fill in the blanks with integers. (a) 5 × ___ - 8 = 37: Class 7

Question 1.

Fill in the blanks with integers.

(a) 5 × ___ - 8 = 37

b) 37 - (33 - ____ ) = 35

(c) - 3 × (- 11 + ____ ) = 45

Solution:

(a) 5 × 9 - 8 = 37

(b) 37 - (33 - 31) = 35

(c) - 3 × (- 11 + -4) = 45

Question 2.

Ranju is a daily wage labourer. She earns ₹ 750 a day. Her employer pays her in 50 and 100 rupee notes. If Ranju gets an equal number of 50 and 100 rupee notes, how many notes of each does she have? Class 7

Solution:

Let the number of each note be x.

So, 50 × x + 100x = 750

or 150x = 750

i.e., x = [latex]\frac {750}{150}[/latex] = 5.

Question 3.

In the given picture, each black blob hides an equal number of blue dots. If there are 25 dots in total, how many dots are covered by one blob? Write an equation to describe this problem. Class 7

Solution:

Let number of dots covered by one blob

So, 3 × x + 4 = 25

or 3x = 25 - 4 = 21

or 3x = 21 or x = [latex]\frac {21}{3}[/latex] = 7.