Simple calculation of 231 + 229 + 233
230+1+230-1+230+3
Simple calculation of 233 times 33 plus 33
233X33+33=(233+1)X33=234X33=7722
A simple calculation for 48 △ 12 × (492-218),
48÷12×(492-218)=4×(492+8-210)
=4×(500-200+10)
=4×310
=4×(300+10)
=1200+40
=1240
How to operate 365 × 99 simply?
365×99
=365×(100-1)
=365×100-365
=36500-365
=36135