巧算253+321+79 / 427-199+72 / 4×9＋6×9
答案:2 悬赏:40 手机版
解决时间 2021-01-09 17:37
- 提问者网友：记得曾经
- 2021-01-08 22:14
巧算253+321+79 / 427-199+72 / 4×9＋6×9
最佳答案
- 五星知识达人网友：神的生死簿
- 2021-01-08 23:02
253+321+79
=253+(321+79)
=253+400
=653
427-199+72
=(427+72)-199
=499-199
=300
4×9＋6×9
=(4+6)×9
=10×9
=90
3×7＋5×7
=(3+5)×7
=8×7
=56
8×3-5×3
=(8-5)×3
=3×3
=9
6×6-4×6
=(6-4)×6
=2×6
=12
6+9×6
=6×(1+9)
=6×10
=60
11×7-7
=(111)×7
=10×7
=70
99×15
=(100-1)×15
=100×15-1×15
=1500-15
=1485
=253+(321+79)
=253+400
=653
427-199+72
=(427+72)-199
=499-199
=300
4×9＋6×9
=(4+6)×9
=10×9
=90
3×7＋5×7
=(3+5)×7
=8×7
=56
8×3-5×3
=(8-5)×3
=3×3
=9
6×6-4×6
=(6-4)×6
=2×6
=12
6+9×6
=6×(1+9)
=6×10
=60
11×7-7
=(111)×7
=10×7
=70
99×15
=(100-1)×15
=100×15-1×15
=1500-15
=1485
全部回答
- 1楼网友：长青诗
- 2021-01-08 23:58
1.253+(321+79)=253+400=653
2.(427+72)-199=499-199=300
3.4x9+6x9=9x(4+6)=4x10=90
4.3×7＋5×7=7(3+5)=56
5.8×3-5×3=3(8+5)=39
6. 6×6-4×6=6(4+6)=60
7.6+9×6 =6(9+1)=60
8.11×7-7=7(11-1)=70
9.99×15+15x(100-1)=1500-15=1485
2.(427+72)-199=499-199=300
3.4x9+6x9=9x(4+6)=4x10=90
4.3×7＋5×7=7(3+5)=56
5.8×3-5×3=3(8+5)=39
6. 6×6-4×6=6(4+6)=60
7.6+9×6 =6(9+1)=60
8.11×7-7=7(11-1)=70
9.99×15+15x(100-1)=1500-15=1485
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