Question

22.5x(75/7+34/11)x1/10+(32/7+57/11)x9/4简便运算？

Answer 1

22.5×(75/7+34/11)×1/10+(32/7+57/11)×9/4
=22.5×1/10×(75/7+34/11)+(32/7+57/11)×9/4
=9/4×(75/7+34/11)+(32/7+57/11)×9/4
=9/4×(75/7+34/11+32/7+57/11)
=9/4×(107/7+91/11)
=9/4×107/7+9/4×91/11
=963/28+819/44
=34又11/28+18又27/44
=53又1/154

Answer 2

22.5x(75/7+34/11)x1/10+(32/7+57/11)x9/4
=22.5x1/10x(75/7+34/11)+(32/7+57/11)x2.25
=2.25x(75/7+34/11)+(32/7+57/11)x2.25
=2.25x(75/7+34/11+32/7+57/11)
=9/4x(107/7+91/11)
=9/4x(1177/77+637/77)
=9/4x1814/77
=8163/154。