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要用梯等式计算(要简便计算,x=乘号):25x28x272x26+36x4863x73-63x6325x28x272x26+36x4863x73-63x63中间是分开的
题目内容:
要用梯等式计算(要简便计算,x=乘号):
25x28x2 72x26+36x48 63x73-63x63
25x28x2 72x26+36x48 63x73-63x63 中间是分开的优质解答
25x28x2
=25*2*28
=50*28
=1400
72x26+36x48
=36*2*26+36*48
=36*52+36*48
=36*(52+48)
=36*100
=3600
63x73-63x63
=63*(73-63)
=63*10
=630
25x28x2 72x26+36x48 63x73-63x63
25x28x2 72x26+36x48 63x73-63x63 中间是分开的
优质解答
=25*2*28
=50*28
=1400
72x26+36x48
=36*2*26+36*48
=36*52+36*48
=36*(52+48)
=36*100
=3600
63x73-63x63
=63*(73-63)
=63*10
=630
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