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

9.6÷0.4×0.25,=24×0.25,=0.25×4×6,=6;8.68-8.68÷0.56×0.5,=8.68-8.68×(0.5÷0.56),=8.68×(1-0.5÷0.56),=8.68×0.06÷0.56,=8.68× 3 28 ,=0.93;29.7÷(5.85÷0.65),=29.7÷9,=3.3;1.25×3.2×0.8,=(1.25×0.8)×3.2,=1×3.2,=3.2;...

9.6÷0.4×0.25,=24×0.25,=0.25×4×6,=6;8.68-8.68÷0.56×0.5,=8.68-8.68×(0.5÷0.56),=8.68×(1-0.5÷0.56),=8.68×0.06÷0.56,=8.68×328,=0.93;29.7÷(5.85÷0.65),=29.7÷9,=3.3;1.25×3.2×0.8,=(1.25×0.8)×3.2,=1×3.2,=3.2;14.5...

=15.8*4/10=6.32

根据题意x=1。

=25/64

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