简便计算：420×36+42×640要420×36+42×640 的格式! = = =

来源：学生作业帮助网编辑：作业帮时间：2024/11/07 14:43:42

简便计算：420×36+42×640要420×36+42×640 的格式! = = =
简便计算：420×36+42×640
要420×36+42×640 的格式!
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简便计算：420×36+42×640要420×36+42×640 的格式! = = =
420x36 + 42x640
= 42 x 10 x 360 + 42 x 640
= 42 x 360 + 42 x 640
= 42 x (360 + 640)
= 42 x 1000
= 42000

420×36+42×640
=42×360+42×640
=42×(360+640)
=42×1000
=42000

420×36+42×640
=42*10*(36+64)
=42000

420×36+42×640
=42×10×36+42×64×10
=42×10×(36+64)
=42000

420×36+42×640
=42×10×(36+64)
=42000

420×36+42×640
=420×36+42×10×64
=420×36+420×64
=420×(36+64)
=420×100
=42000