555×55+555×5.5-550×1.1怎样脱式计算?
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555×55+555×5.5-550×1.1
=555×(55+5.5)-550×1.1
=555×60.5-550×1.1
=555×60.5-605
=555×60.5-60.5×10
=60.5×(555-10)
=60.5×545
=32972.5
=555×(55+5.5)-550×1.1
=555×60.5-550×1.1
=555×60.5-605
=555×60.5-60.5×10
=60.5×(555-10)
=60.5×545
=32972.5
追答
555×55+555×5.5-550×1.1
=555×(55+5.5)-550×1.1
=555×60.5-550×1.1
=555×60.5-605
=555×60.5-60.5×10
=60.5×(555-10)
=60.5×545
=32972.5
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