问题
解答题
|
答案
(1)73+3.4+27+5.6,
=(73+27)+(3.4+5.6),
=100+9,
=109;
(2)7.25-3.42-1.58,
=7.25-(3.42+1.58),
=7.25-5,
=2.25;
(3)99×32,
=100×32-1×32,
=3200-32,
=3168;
(4)125×89×8,
=125×8×89,
=1000×89,
=89000.
|
(1)73+3.4+27+5.6,
=(73+27)+(3.4+5.6),
=100+9,
=109;
(2)7.25-3.42-1.58,
=7.25-(3.42+1.58),
=7.25-5,
=2.25;
(3)99×32,
=100×32-1×32,
=3200-32,
=3168;
(4)125×89×8,
=125×8×89,
=1000×89,
=89000.