计算下列各题，能简算的要简算：0.25*6.25*400 36.5*21.5-11.5*36.5 49.5*101 5.7*2.8+6.2*5.7+5.7
答案:3 悬赏:50 手机版
解决时间 2021-12-04 03:12
- 提问者网友：欲望失宠
- 2021-12-03 05:24
计算下列各题，能简算的要简算：0.25*6.25*400 36.5*21.5-11.5*36.5 49.5*101 5.7*2.8+6.2*5.7+5.7
最佳答案
- 五星知识达人网友：西岸风
- 2021-12-03 05:46
1题
0.25×6.25×400
=0.25×6.25×4×100
=(0.25×4)×(6.25×100)
=1×625
=625
2题
36.5×21.5-11.5×36.5
=36.5×21.5-36.5×11.5
=36.5×(21.5-11.5)
=36.5×10
=365
3题
49.5×101
=49.5×(100+1)
=49.5×100+49.5×1
=4950+49.5
=4999.5
4题
5.7×2.8+6.2×5.7+5.7
=5.7×2.8+5.7×6.2+5.7×1
=5.7×(2.8+6.2+1)
=5.7×10
=57追问真不知道采纳哪一个才好
0.25×6.25×400
=0.25×6.25×4×100
=(0.25×4)×(6.25×100)
=1×625
=625
2题
36.5×21.5-11.5×36.5
=36.5×21.5-36.5×11.5
=36.5×(21.5-11.5)
=36.5×10
=365
3题
49.5×101
=49.5×(100+1)
=49.5×100+49.5×1
=4950+49.5
=4999.5
4题
5.7×2.8+6.2×5.7+5.7
=5.7×2.8+5.7×6.2+5.7×1
=5.7×(2.8+6.2+1)
=5.7×10
=57追问真不知道采纳哪一个才好
全部回答
- 1楼网友：孤独的牧羊人
- 2021-12-03 08:03
1/ 0.25×6.25×400
=0.25×6.25×4×100
=(0.25×4)×(6.25×100)
=1×625
=625
2/ 36.5×21.5-11.5×36.5
=36.5×21.5-36.5×11.5
=36.5×(21.5-11.5)
=36.5×10
=365
3/ 49.5×101
=49.5×(100+1)
=49.5×100+49.5×1
=4950+49.5
=4999.5
4/ 5.7×2.8+6.2×5.7+5.7
=5.7×2.8+5.7×6.2+5.7×1
= 5.7×(2.8+6.2+1)
=5.7×10
=57追问真不知道采纳哪一个才好
=0.25×6.25×4×100
=(0.25×4)×(6.25×100)
=1×625
=625
2/ 36.5×21.5-11.5×36.5
=36.5×21.5-36.5×11.5
=36.5×(21.5-11.5)
=36.5×10
=365
3/ 49.5×101
=49.5×(100+1)
=49.5×100+49.5×1
=4950+49.5
=4999.5
4/ 5.7×2.8+6.2×5.7+5.7
=5.7×2.8+5.7×6.2+5.7×1
= 5.7×(2.8+6.2+1)
=5.7×10
=57追问真不知道采纳哪一个才好
- 2楼网友：夜风逐马
- 2021-12-03 06:53
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