Question

39×52的積與（　�。┳罱咏�．

A．1850

B．2500

C．2000

D．無(wú)選項(xiàng)

Answer 1

分析：在乘法估算中一般要根據(jù)“四舍五入”法，把因數(shù)看作是整十，整百，整千…的數(shù)來(lái)進(jìn)行計(jì)算，39×52中要把39看作40，52看作50來(lái)進(jìn)行計(jì)算．據(jù)此解答．

解答：解：39×52≈40×50=2000．
故選：C．

點(diǎn)評(píng)：本題考查了學(xué)生乘法估算的計(jì)算能力．