759 * 11-759 321 * 77-62 * 321 26 * 145-44 * 26-26 15 * (40-6) 27 * 31 + 31 * 72 + 31 How to calculate easily? It must be easy to calculate!

759 * 11-759 321 * 77-62 * 321 26 * 145-44 * 26-26 15 * (40-6) 27 * 31 + 31 * 72 + 31 How to calculate easily? It must be easy to calculate!

(1)759*11-759=759*(11-1)=759*10=7590(2) 321*77-62*321=321*(77-62)=321*15=4815（3）26*145-44*26-26=26（145-44-1）=26*100=2600（4）15*(40-6)=15*40-15*6=600-90=510（5）27*31+31*72+31=31*（27+72+1）=31*10...

321 times 46 minus 92 times 27 minus 67 times 46 300 points!
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Note: valid before Wednesday. Answer 5-350 on the same day, 5-150 on the next day and 5-20 on Wednesday
Simple calculation required!

321*46-92*27-67*46
＝321*46-54*46-67*46
＝（321-54-67）*46
＝（321-121）*46
＝200*46
＝9200

How can 92.27-7.65 + 3.65 be easily calculated

92.27-7.65+3.65
=92.27-（7.65-3.65）
=92.27-4
=88.27