用简便方法计算下面各题25×1.25×32 73.8×16-7.38×6

2024-10-30 19:39:28
推荐回答(2个)
回答1:

(1)25×1.25×32,
=25×1.25×4×8,
=(25×4)×(1.25×8),
=100×10,
=1000;
(2)73.8×16-7.38×60,
=7.38×160-7.38×60,
=7.38×(160-60);
=7.38×100,
=738;
(3)1.25+
5
4
×0.4+125%÷
5
8

=1.25+1.25×0.4+1.25×1.6,
=1.25×(1+0.4+1.6),
=1.25×3,
=3.75.

回答2:

25×1.25×32
=25*5/4 *4*8
=125*8
=1000
73.8×16-7.38×60
=73.8×16-73.8×6
=73.8*10
=738