题目内容
【题目】细心算一算。
(1)78-8-9=
(2)68-(7-2)=
(3)54-(3+27)
(4)46-7+20=
【答案】61;63;24;59
【解析】
(1)78-8-9
=70-9
=61
(2)68-(7-2)
=68-5
=63
(3)54-(3+27)
=54-30
=24
(4)46-7+20
=39+20
=59
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题目内容
【题目】细心算一算。
(1)78-8-9=
(2)68-(7-2)=
(3)54-(3+27)
(4)46-7+20=
【答案】61;63;24;59
【解析】
(1)78-8-9
=70-9
=61
(2)68-(7-2)
=68-5
=63
(3)54-(3+27)
=54-30
=24
(4)46-7+20
=39+20
=59