Simple algorithm of 0.8 × (3.2-0.4) × 0.212.75 × (16-7.36-3.64) Simple algorithm of 0.8 × (3.2-0.4) × 0.212.75 × (16-7.36-3.64)
0.8×(3.2-0.4)÷0.2
=4×2.8
=11.2
12.75÷(16-7.36-3.64)
=12.75÷(16-(7.36+3.64))
=12.75÷(16-11)
=12.75÷5
=2.55
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