Question

用简便计算一百五十六加七十八乘一千九百八十三加二十二乘一千九百八十五怎么算？

Answer 1

156+78x1983+22x1985
=156+78x1983+22x(1983+2)
=156+78x1983+22x1983+22x2
=156+(78+22)x1983+44
=156+44+100x1983
=200+198300
=198500

或者
=156+78x(1985-2)+22x1985
=156+78x1985-78x2+22x1985
=156-156+(78+22)x1985
=0+100x1985
=198500

Answer 2

156+78×1983+22×1985
=156+78×(1985-2)+(100-78)×1985
=156+78×1985-78×2+100×1985-78×1985
=156-78×2+78×1985-78×1985+100×1985
=198500