12x[34x2十(34 5)]十34x8的简便运算

2025-02-26 22:05:27
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回答1:

12x[34x2十(34 5)]十34x8的简便运算
12x[34x2十(34 5)]十34x8
=34*(2+5)*12+34*8
=34*(84+8)
=34*100-34*8
=3400-272
=3128