来自苏红旗的问题
【脱式计算.(能简算的要简算)4.6-(1.42+2.07)12.4-6.7-3.33.78+4.86+0.788.6+4.75-7.47.】
脱式计算.(能简算的要简算)
4.6-(1.42+2.07)
12.4-6.7-3.3
3.78+4.86+0.78
8.6+4.75-7.47.
1回答
2020-04-07 17:40
【脱式计算.(能简算的要简算)4.6-(1.42+2.07)12.4-6.7-3.33.78+4.86+0.788.6+4.75-7.47.】
脱式计算.(能简算的要简算)
4.6-(1.42+2.07)
12.4-6.7-3.3
3.78+4.86+0.78
8.6+4.75-7.47.
(1)4.6-(1.42+2.07)
=4.6-3.49
=1.11;
(2)12.4-6.7-3.3
=12.4-(6.7+3.3)
=12.4-10
=2.4;
(3)3.78+4.86+0.78
=8.64+0.78
=9.42;
(4)8.6+4.75-7.47
=13.35-7.47
=5.88.