来自房岚的问题
【计算:(1)-4.2+5.7-8.4+10;(2)6.1-3.7-4.9+1.8;(3)13-23+1;(4)-14+56+23-12.】
计算:
(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;
(3)13-23+1; (4)-14+56+23-12.
1回答
2020-04-06 01:46
【计算:(1)-4.2+5.7-8.4+10;(2)6.1-3.7-4.9+1.8;(3)13-23+1;(4)-14+56+23-12.】
计算:
(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;
(3)13-23+1; (4)-14+56+23-12.
(1)原式=(10+5.7)-(4.2+8.4),
=15.7-12.6,
=3.1;
(2)原式=(6.1+1.8)-(3.7+4.9),
=7.9-8.6,
=-0.7;
(3)原式=-13