The simple calculation is 2.78 * 4.9 + 0.49 * 72.2,

The simple calculation is 2.78 * 4.9 + 0.49 * 72.2,

2.78*4.9+0.49*72.2
=2.78*4.9+4.9*7.22
=4.9*（2.78+7.22）
=4.9*10
=49

Can 6.72 + (9.12-3.72) be simplified

6.72+(9.12-3.72)
=6.72-3.72+9.12
=3+9.12
=12.12
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How to calculate 14.72-4.5 + 5.28?

14.72-4.5+5.28
=14.72+5.28-4.5
=20-4.5
=15.5