用简便方法计算.17.2-1.58-4.424.77+7.46+1.23+2.5416.35-(4.71+6.35)9.
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:综合作业 时间:2024/06/25 03:02:13
用简便方法计算.
17.2-1.58-4.42
4.77+7.46+1.23+2.54
16.35-(4.71+6.35)
9.38-6.8+6.62-3.2.
17.2-1.58-4.42
4.77+7.46+1.23+2.54
16.35-(4.71+6.35)
9.38-6.8+6.62-3.2.
![用简便方法计算.17.2-1.58-4.424.77+7.46+1.23+2.5416.35-(4.71+6.35)9.](/uploads/image/z/14840850-66-0.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%8E17.2-1.58-4.424.77%2B7.46%2B1.23%2B2.5416.35-%EF%BC%884.71%2B6.35%EF%BC%899.)
①17.2-1.58-4.42
=17.2-(1.58+4.42)
=17.2-6
=11.2
②4.77+7.46+1.23+2.54
=(4.77+1.23)+(7.46+2.54)
=6+10
=16
③16.35-(4.71+6.35)
=16.35-4.71-6.35
=(16.35-6.35)-4.71
=10-4.71
=5.29
④9.38-6.8+6.62-3.2
=(9.38+6.62)-(6.8+3.2)
=16-10
=6
=17.2-(1.58+4.42)
=17.2-6
=11.2
②4.77+7.46+1.23+2.54
=(4.77+1.23)+(7.46+2.54)
=6+10
=16
③16.35-(4.71+6.35)
=16.35-4.71-6.35
=(16.35-6.35)-4.71
=10-4.71
=5.29
④9.38-6.8+6.62-3.2
=(9.38+6.62)-(6.8+3.2)
=16-10
=6