脱式计算.(能简算的要简算)5×6.6+7.5×6.61123×2424×(23-14+512)115÷3.25+813315+413÷3.75.-数学
题文
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答案
(1)5×6.6+7.5×6.6, =(5+7.5)×6.6, =12.5×6.6, =82.5; (2)
=
=
=11+
=11
(3)24×(
=24×
=16-6+10, =20; (4)
=
=
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题文
|
答案
(1)5×6.6+7.5×6.6, =(5+7.5)×6.6, =12.5×6.6, =82.5; (2)
=
=
=11+
=11
(3)24×(
=24×
=16-6+10, =20; (4)
=
=
|