题目内容
【题目】脱式计算,能简算的要简算。
①0.575×29+2.9×4.25
② ÷
③36÷( + )
④ ÷125%
⑤ ×[ -( )]
⑥2016×
【答案】29 2014
【解析】
(1)根据乘法结合律进行计算即可;;
(2)先算括号里的加法,再算除法,最后算减法;
(3)先算括号里的加法,再算除法;
(4)根据乘法结合律进行计算即可;
(5)先算括号里的,再算乘法;
(6)先把2016写成2015+1,在根据分配率计算即可.
①0.575×29+2.9×4.25
=(0.575+0.425)×29
=1×29
=29
② ÷
= ×
= ×
=
=
=
③36÷( + )
=36÷( + )
=36÷
=36×
=
④ ÷125%
= + ×
= ×( + )
= ×1
=
⑤ ×[ -( )]
= ×( - + )
= ×
=
⑥2016×
=(2015+1)×
=2015× +
=2014+
=2014
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