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①1.25×0.25×0.8×4②29.8%(9.8+2.99÷2.3)③( 16 ...

①1.25×0.25×0.8×4=(1.25×0.8)×(0.25×4),=1×1,=1;②29.8-(9.8+2.99÷2.3)=29.8-(9.8+1.3),=29.8-11.1,=18.7;③(16 1 10 -15.3)× 1 6 ×2.4,=0.8× 1 6 ×2.4,=0.32;④1.75×0.25+0.25×6.25=0.25×(1.75+6.25),=0.25×8,=2;⑥( 3 8...

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