#!/bin/bash
echo "number 1"
read a
echo "number 2"
read b 

sum=$(echo "$a + $b" | bc)
diff=$(echo "$a - $b" | bc)
quot=$(echo "scale=2; $a / $b" | bc)
rem=$(echo "$a % $b" | bc)

echo "sum=$sum"
echo "difference=$diff"
echo "quotation=$quot"
echo "remainder=$rem"