7.2*5.8+0.72*42简便运算高手请帮帮忙
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 16:19:31
![7.2*5.8+0.72*42简便运算高手请帮帮忙](/uploads/image/z/130241-65-1.jpg?t=7.2%2A5.8%2B0.72%2A42%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%E9%AB%98%E6%89%8B%E8%AF%B7%E5%B8%AE%E5%B8%AE%E5%BF%99)
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7.2*5.8+0.72*42简便运算高手请帮帮忙
7.2*5.8+0.72*42简便运算高手请帮帮忙
7.2*5.8+0.72*42简便运算高手请帮帮忙
=7.2*5.8+7.2*4.2
=7.2(5.8+4.2)
7.2*5.8+0.72*42简便运算高手请帮帮忙
=7.2×5.8+7.2×4.2
=7.2×(5.8+4.2)
=7.2×10
=72
0.72×10×5.8+0.72×42
=0.72×58+0.72×42
=0.72×(58+42)
=0.72×100
=72
7.2×5.8+0.72×42=7.2×5.8+7.2×4.2=7.2×(5.8+4.2)=7.2×10=72
(7.2*5.8)+(5.8*42)
等于,7.2×5.8+7.2×42=7.2×10=72