Using shortcut method to determine 9823-999.
Step I - Let's split 999 into (1000-1) to use shortcut method.
9823-999 = 9823-1000+1 = 8823+1
= 8824
Hence, 9823-999 = 8824.
Using shortcut method to determine 334+9.
Using shortcut method to determine 2300÷25.
Using shortcut method to determine 892+99.
Using shortcut method to determine 128000×625.
Using shortcut method to determine 324×25.