36×52+46×47+46怎么简便运算
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你好!36×52+46×47+46怎么简便运算?
1.先把46变成:46×1。
2.把46×1代入算式,46×47+46×1,即:
46×47+46×1
=46×(47+1)
=46×48
3.把48变成50-2,52变成50+2,代入算式进行计算,即:
36×52+46×48
=36×(50+2)+46×(50-2)
=36×50+36×2+46×50-46×2
=36×50+46×50+36×2-46×2
=1800+2300+72-92
=4100+72-92
=4172-92
=4080
1.先把46变成:46×1。
2.把46×1代入算式,46×47+46×1,即:
46×47+46×1
=46×(47+1)
=46×48
3.把48变成50-2,52变成50+2,代入算式进行计算,即:
36×52+46×48
=36×(50+2)+46×(50-2)
=36×50+36×2+46×50-46×2
=36×50+46×50+36×2-46×2
=1800+2300+72-92
=4100+72-92
=4172-92
=4080
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