把下面的算式补充完整.
18.7-16.4+________
=18.7+________-l6.4
=20-16.4
=________
35.67+________+21.35
=35.67+(________+21.35)
=35.67+50
=________
54.37-________-9.23
=54.37-(________+9.23)
=54.37-10
=________
33.25+6.23-________
=33.25-________+6.23
=30+6.23
=________.
把下面的算式补充完整.18.7-16.4+________=18.7+________-l6.4=20-16.4=________35.67+________+21.
答案:2 悬赏:10 手机版
解决时间 2021-04-08 17:32
- 提问者网友:斑駁影
- 2021-04-08 01:27
最佳答案
- 五星知识达人网友:怀裏藏嬌
- 2021-04-08 02:58
2.2 2.2 3.6 28.65 28.65 85.67 0.77 0.77 44.37 3.25 3.25 36.23解析分析:(1)根据第二步17.8加几的和是20,那么所缺的数是20-17.8=2.2,然后再进一步解答;
(2)根据第二步小括号里面的几加21.35的和是50,那么所缺的数是50-21.35=28.65,然后再进一步解答;
(3)根据第二步小括号里面的几加9.23的和是10,那么所缺的数是10-9.23=0.77,然后再进一步解答;
(4)根据第二步33.25减几的差是30,那么所缺的数是33.25-30=3.25,然后再进一步解答.解答:
(1)18.7-16.4+2.2,
=18.7+2.2-l6.4,
=20-16.4,
=3.6;(2)35.67+28.65+21.35,
=35.67+( 28.65+21.35),
=35.67+50,
=85.67;(3)54.37-0.77-9.23,
=54.37-( 0.77+9.23),
=54.37-10,
=44.37;(4)33.25+6.23-3.25,
=33.25-3.25+6.23,
=30+6.23,
=36.23.故
(2)根据第二步小括号里面的几加21.35的和是50,那么所缺的数是50-21.35=28.65,然后再进一步解答;
(3)根据第二步小括号里面的几加9.23的和是10,那么所缺的数是10-9.23=0.77,然后再进一步解答;
(4)根据第二步33.25减几的差是30,那么所缺的数是33.25-30=3.25,然后再进一步解答.解答:
(1)18.7-16.4+2.2,
=18.7+2.2-l6.4,
=20-16.4,
=3.6;(2)35.67+28.65+21.35,
=35.67+( 28.65+21.35),
=35.67+50,
=85.67;(3)54.37-0.77-9.23,
=54.37-( 0.77+9.23),
=54.37-10,
=44.37;(4)33.25+6.23-3.25,
=33.25-3.25+6.23,
=30+6.23,
=36.23.故
全部回答
- 1楼网友:风格不统一
- 2021-04-08 04:25
你的回答很对
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