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【北师大版(-64)+17+(-23)+68(-52)+241+(-74)+241+(-23)+(-31)+0(-26)+52+16+(-72)这几道题不明白,】
题目内容:
北师大版
(-64)+17+(-23)+68 (-52)+241+(-74)+2 41+(-23)+(-31)+0
(-26)+52+16+(-72)这几道题不明白,优质解答
(-64)+17+(-23)+68
=-64+17-23+68
=-47-23+68
=-70+68
=-2
(-52)+241+(-74)+2
=-52+241-74+2
=189-74+2
=115+2
=117
41+(-23)+(-31)+0
=41-23-31+0
=18-31+0
=-13
(-26)+52+16+(-72)
=-26+52+16-72
=26+16-72
=42-72
=-30
(-64)+17+(-23)+68 (-52)+241+(-74)+2 41+(-23)+(-31)+0
(-26)+52+16+(-72)这几道题不明白,
优质解答
=-64+17-23+68
=-47-23+68
=-70+68
=-2
(-52)+241+(-74)+2
=-52+241-74+2
=189-74+2
=115+2
=117
41+(-23)+(-31)+0
=41-23-31+0
=18-31+0
=-13
(-26)+52+16+(-72)
=-26+52+16-72
=26+16-72
=42-72
=-30
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