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3.75 × 4.8 + 62.5 × 0.48 is calculated by simple algorithm of disjunction formula. 3.75 × 4.8+ 3.75 × 4.8 + 62.5 × 0.48 are calculated by the simple algorithm 3.75×4.8+62.5×0.48 = = = =
3.8-2.7 + 7.2 △ 1.44 × 0.4
3.8-2.7+7.2÷1.44×0.4=1.1+5*0.4=1.1+2=3.1
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