Question

四年级下册用简便方法计算37✘24✘76怎么立式？

Answer 1

解: 37X24X76

=37X24X(100-24)

=37X(24X100-24X24)

=37X(2400-576)

=(40-3)x2400-(40-3)x(576)

=(40X2400-3X2400)-(40X576-3X 576)

=(96000-7200)-(23040-1728)

=88800-21312

=67488

Answer 2

=76×(40×24-3×24)，
=76×(960-72)，
=76×(960-100+30-2)，
=76×(1000-40-100+30-2),
=76×(900-10-2),
=76×900-76×10-76×2,
=80×90-4×900-760-160+8，
=7200-3600-920+8,
=3600-1000+80+8,
=2600+88,
=2688