问题
解答题
简便计算.
|
答案
(1)9.6+1.8-1.6,
=(9.6-1.6)+1.8,
=8+1.8,
=9.8;
(2)0.21+3.48+0.89+2.52,
=(0.21+0.89)+(3.48+2.52),
=1.1+6,
=7.1;
(3)15.3-(0.91+2.3),
=15.3-0.91-2.3,
=(15.3-2.3)-0.91,
=13-0.91,
=12.09.
简便计算.
|
(1)9.6+1.8-1.6,
=(9.6-1.6)+1.8,
=8+1.8,
=9.8;
(2)0.21+3.48+0.89+2.52,
=(0.21+0.89)+(3.48+2.52),
=1.1+6,
=7.1;
(3)15.3-(0.91+2.3),
=15.3-0.91-2.3,
=(15.3-2.3)-0.91,
=13-0.91,
=12.09.