0.8×72.4×12.4用简便运算
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/14 16:05:47
0.8×72.4×12.4用简便运算
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![0.8×72.4×12.4用简便运算](/uploads/image/z/6789475-19-5.jpg?t=0.8%C3%9772.4%C3%9712.4%E7%94%A8%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
0.8×72.4×12.4
=0.8×72.4×(12.5-0.1)
=10x72.4-0.08x72.4
=724-(7.24-1.448)
=724-7.24+1.448
=714+2.76+1.448
=714+3+1.448-0.24
=718.208
=0.8×72.4×(12.5-0.1)
=10x72.4-0.08x72.4
=724-(7.24-1.448)
=724-7.24+1.448
=714+2.76+1.448
=714+3+1.448-0.24
=718.208