Simple calculation of 99 * 0.55 * 2

Simple calculation of 99 * 0.55 * 2

99*0.55*2
=99*1.1
=（100-1）*1.1
=100*1.1-1.1
=110-1.1
=108.9
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The following questions are 65 * 25 * 4
86 * 16-86 * 6 [35 + (184-119)] * 13 765 / [(12 + 5) * 5] fast

65×（25×4）=65×100=6500
86×（16-6）=86×10=860
[(35+184)-119]×13=(219-119)×13=200×13=2600
765÷5÷17=153÷17=9

How to simplify the calculation of 2 △ (1 / 27-1 / 36) × 6?

2×6÷（1/27-1/36）
＝12÷1/108
＝12×108
＝12×（100+8）
＝1200+96
＝1296

Simple calculation of 8160 △ 24-36 × 25

Divide first, multiply then subtract