脱式计算.(能简算的要简算) 6.8×0.75÷0.5 13.5÷2.5-2.75
脱式计算.(能简算的要简算)6.8×0.75÷0.513.5÷2.5-2.750.125×0.25×320.9+9.9+99.9+0.3....
脱式计算.(能简算的要简算) 6.8×0.75÷0.5 13.5÷2.5-2.75 0.125×0.25×32 0.9+9.9+99.9+0.3.
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(1)6.8×0.75÷0.5,
=68×(0.75÷0.5),
=68×1.5,
=102;
(2)13.5÷2.5-2.75,
=5.4-2.75,
=2.65;
(3)0.125×0.25×32,
=0.125×0.25×4×8,
=(0.125×8)×(0.25×4),
=1×1,
=1;
(4)0.9+9.9+99.9+0.3,
=(1-0.1)+(10-0.1)+(100-0.1)+0.3,
=111-0.3+0.3,
=111.
=68×(0.75÷0.5),
=68×1.5,
=102;
(2)13.5÷2.5-2.75,
=5.4-2.75,
=2.65;
(3)0.125×0.25×32,
=0.125×0.25×4×8,
=(0.125×8)×(0.25×4),
=1×1,
=1;
(4)0.9+9.9+99.9+0.3,
=(1-0.1)+(10-0.1)+(100-0.1)+0.3,
=111-0.3+0.3,
=111.
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(1)6.8×0.75÷0.5,
=68×(0.75÷0.5),
=68×1.5,
=102;
(2)13.5÷2.5-2.75,
=5.4-2.75,
=2.65;
(3)0.125×0.25×32,
=0.125×0.25×4×8,
=(0.125×8)×(0.25×4),
=1×1,
=1;
(4)0.9+9.9+99.9+0.3,
=(1-0.1)+(10-0.1)+(100-0.1)+0.3,
=111-0.3+0.3,
=111.
=68×(0.75÷0.5),
=68×1.5,
=102;
(2)13.5÷2.5-2.75,
=5.4-2.75,
=2.65;
(3)0.125×0.25×32,
=0.125×0.25×4×8,
=(0.125×8)×(0.25×4),
=1×1,
=1;
(4)0.9+9.9+99.9+0.3,
=(1-0.1)+(10-0.1)+(100-0.1)+0.3,
=111-0.3+0.3,
=111.
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