4x7x25x125x24用什么简便方法计算?
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原式=4x7x25x125x24
=4x25x7x125x4x6
=100x7x500x6
=100x7x3000
=7x300000
=2100000
=4x25x7x125x4x6
=100x7x500x6
=100x7x3000
=7x300000
=2100000
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拆数、配对
4x7x25x125x24
=4x7x25x125x3x8
=7x3x(4x25)x(8x125)
=7x3x100x1000
=2100000
4x7x25x125x24
=4x7x25x125x3x8
=7x3x(4x25)x(8x125)
=7x3x100x1000
=2100000
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=4*7*25*125*8*3
=(4*25)*(125*8)*7*3
=100*1000*21
=2100000
=(4*25)*(125*8)*7*3
=100*1000*21
=2100000
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(4×7×125)×(25×24)
=3500×600
=2100000
=3500×600
=2100000
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