题目内容
计算下面各题,怎样简便就怎样算.
①1.29+3.7+0.71+6.3
②19×96+962÷74
③19×36-36×9
④425÷25+575÷25.
①1.29+3.7+0.71+6.3
②19×96+962÷74
③19×36-36×9
④425÷25+575÷25.
①1.29+3.7+0.71+6.3
=(1.29+0.71)+(3.7+6.3),
=2+10,
=12;
②19×96+962÷74
=1824-13,
=1811;
③19×36-36×9
=(19-9)×36,
=10×36,
=360;
④425÷25+575÷25
=(425+575)÷25,
=1000÷25,
=40.
=(1.29+0.71)+(3.7+6.3),
=2+10,
=12;
②19×96+962÷74
=1824-13,
=1811;
③19×36-36×9
=(19-9)×36,
=10×36,
=360;
④425÷25+575÷25
=(425+575)÷25,
=1000÷25,
=40.
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