I want the fifth grade mathematics decimal addition and subtraction method simple calculation

A + B = B + AA + B + C = a + (B + C) a-b-c = a - (B + C) 5.93 + 0.19 + 2.81 3.07-0.38-1.62 7.3 + 2.7-7.3 + 2.7 1.27 + 3.9 + 0.73 + 16.148.4 + 2.78 + 51.6-0.78 23.4-0.8-13.4-7.2 139.46 - (58.74 + 1

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