Question

299×58+58简便算法

299×58+58简便算法

Answer 1

299×58+58
＝（299+1）×58
＝300×58
＝17400
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Answer 2

299×58+58
=299×58+58×1
=（299+1）×58
=300×58
=300×（50+8）
=300×50+300×8
=15000+2400
=17400
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Answer 3

299×58+58
＝（299＋1）x58
=300x58
=17400

Answer 4

=（299+1）×58
=300×58
=300×（50+8）
=300×50+300×8
=15000+2400
=17400
乘法分配律
望采纳！

Answer 5

299×58+58
＝（299＋1）x58
=300x58
=300x(60-2)
=18000-600
=17400