选择合适的方法计算.①1513?(213?57)②47÷79×34③58÷[(12+23)÷47]④3.4×5.9+5.9×5.6+5.9⑤4.82×1
选择合适的方法计算.①1513?(213?57)②47÷79×34③58÷[(12+23)÷47]④3.4×5.9+5.9×5.6+5.9⑤4.82×10.1⑥[4.8-...
选择合适的方法计算.①1513?(213?57)②47÷79×34③58÷[(12+23)÷47]④3.4×5.9+5.9×5.6+5.9⑤4.82×10.1⑥[4.8-0.24÷(5-4.76)]÷3.8.
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猥琐教主188
2014-10-13
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①
?(?)=
?+
,
=1+
,
=1
;
②
÷×=
×
×
,
=
;
③
÷[(+)÷]=
÷[
×
],
=
×
,
=
;
④3.4×5.9+5.9×5.6+5.9
=(3.4+5.6+1)×5.9,
=10×5.9,
=59;
⑤4.82×10.1
=4.82×(10+0.1),
=4.82×10+4.82×0.1,
=48.2+0.482,
=48.682;
⑥[4.8-0.24÷(5-4.76)]÷3.8
=[4.8-0.24÷0.24]÷3.8,
=[4.8-1]÷3.8,
=3.8÷3.8,
=1.
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