问题
解答题
计算下面各题,能简便的要用简便方法计算.
9.6+1.8-1.50.21+3.48+0.7915.3-(0.91+2.3)
答案
①9.6+1.8-1.5
=11.4-1.5
=9.9;
②0.21+3.48+0.79
=3.48+(0.21+0.79)
=3.48+1
=4.48;
③15.3-(0.91+2.3)
=15.3-2.3-0.91
=13-0.91
=12.09.
计算下面各题,能简便的要用简便方法计算.
9.6+1.8-1.50.21+3.48+0.7915.3-(0.91+2.3)
①9.6+1.8-1.5
=11.4-1.5
=9.9;
②0.21+3.48+0.79
=3.48+(0.21+0.79)
=3.48+1
=4.48;
③15.3-(0.91+2.3)
=15.3-2.3-0.91
=13-0.91
=12.09.