4321乘3456减4322乘3455
=4321x3456-4321x3455-3455
=4321x(3456-3455)-3455
=4321-3455
=4321-3500+45
=821+45
=866
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4321乘3456减4322乘3455
=4321x3456-4321x3455-3455
=4321x(3456-3455)-3455
=4321-3455
=4321-3500+45
=821+45
=866
如果本题有什么不明白可以追问,如果满意请点击“选为满意答案”