West Bengal Board Solutions for Chapter: Revision of Previous Lessons, Exercise 3: Let us work out - 1.1

Let us find the value of simplification sum:

$\left\{25\times 16÷\left(60÷15\right)-4\times \left(77-62\right)\right\}÷\left(20\times 6÷3\right)$

Let us find the value of simplification sum:

$\left[16÷\left\{42-\overline{38+2}\right\}\right]12÷\left(24÷6\right)\times 2+4$

Let us find the value of simplification sum:

$4\times \left[24-\left\{\left(110-\overline{11+3}\times 4\right)÷9\right\}\right]÷2 of 9$

Let us find the value of simplification sum:

$200÷\left[88-\left\{\left(12\times 13\right)-3\times \left(40-9\right)\right\}\right]$

Let us find the value of simplification sum:

$\left(987-\overline{43+25}\right)-10\left[5+\left\{\left(999÷\overline{9\times 3}\right)\right\}+\left(\overline{8\times 9}÷6\right)4\right]$

Let us form a story for following simplification and then solve:

$\left(12-2\right)÷2$

Let us form a story for following simplification and then solve:

$\left\{90-\left(48-21\right)\right\}÷7$

Rajdeep's father sold $125$ guavas from their guava orchard for $₹2$ each at Baruipur market. With the money he brought $2$ pens for $₹5$ each and $2$ exercise books for $₹20$ each and divided the remaining money among two brother and sister to buy sweets. If Rajdeep got $₹k$ for buying sweets, then find the value of $k$.