两道数学简便计算题! 1.-58+12又4/5+31又3/5-42 2.-4又1/4-4.25×6又...
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发布时间:2024-10-02 11:15
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热心网友
时间:2024-10-08 01:24
1. -58+12又4/5+31又3/5-42
=-58+12+4/5+31+3/5-42
=-58-42+12+31+3/5+4/5
=-100+43+7/5
=-57+1+2/5
=-56+2/5
=-55-1+2/5
=-55-3/5
=-55又3/5
2. -4又1/4-4.25×6又1/6+4又1/4
=4又1/4-4又1/4-4.25×6又1/6
=-4.25×6又1/6
=-(4+1/4)×(6+1/6)
=-17/4×37/6
=-629/24
=-26-5/24
=-26又5/24
热心网友
时间:2024-10-08 01:22
1 145
2 444
热心网友
时间:2024-10-08 01:23
解:
1.=-58+64/5+158/5-42
=-58-42+(64/5+158/5)
=-100+222
=122
热心网友
时间:2024-10-08 01:18
1:200000 2:2000