计算下面各题,这样简便就怎样算.(要递等式)
来源:学生作业帮 编辑:灵鹊做题网作业帮 分类:数学作业 时间:2024/06/28 16:08:44
计算下面各题,这样简便就怎样算.(要递等式)
48×69+48×31 26×45÷(85-46) 125.3-27.44-12.56
7200÷25÷4 2.95+23.47+5.05+6.53 0.25×32×12.5
48×69+48×31 26×45÷(85-46) 125.3-27.44-12.56
7200÷25÷4 2.95+23.47+5.05+6.53 0.25×32×12.5
![计算下面各题,这样简便就怎样算.(要递等式)](/uploads/image/z/17766013-13-3.jpg?t=%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98%2C%E8%BF%99%E6%A0%B7%E7%AE%80%E4%BE%BF%E5%B0%B1%E6%80%8E%E6%A0%B7%E7%AE%97.%EF%BC%88%E8%A6%81%E9%80%92%E7%AD%89%E5%BC%8F%EF%BC%89)
48×69+48×31
=48×(69+31)
=48×100
=4800
26×45÷(85-46)
=26×45÷39
=26÷13×(45÷3)
=2×15
=30
125.3-27.44-12.56
=125.3-(27.44+12.56)
=125.3-40
=85.3
7200÷25÷4
=7200÷(25×4)
=7200÷100
=72
2.95+23.47+5.05+6.53
=(2.85+5.05)+(23.47+6.53)
=8+30
=38
0.25×32×12.5
=(0.25×4)×(12.5×8)
=100
=48×(69+31)
=48×100
=4800
26×45÷(85-46)
=26×45÷39
=26÷13×(45÷3)
=2×15
=30
125.3-27.44-12.56
=125.3-(27.44+12.56)
=125.3-40
=85.3
7200÷25÷4
=7200÷(25×4)
=7200÷100
=72
2.95+23.47+5.05+6.53
=(2.85+5.05)+(23.47+6.53)
=8+30
=38
0.25×32×12.5
=(0.25×4)×(12.5×8)
=100