脱式计算(能简算的要简算) 216+384+404+796 154-(54+98) 17×25×4 160-60÷2 420÷35 237-58+163-242.
问题描述:
脱式计算(能简算的要简算)
216+384+404+796 | 154-(54+98) | 17×25×4 |
160-60÷2 | 420÷35 | 237-58+163-242. |
答
(1)216+384+404+796,
=(216+384)+(404+796),
=600+1200,
=1800;
(2)154-(54+98),
=154-54-98,
=100-98,
=2;
(3)17×25×4,
=17×(25×4),
=17×100,
=1700;
(4)160-60÷2,
=160-30,
=130;
(5)420÷35,
=(420÷7)÷(35÷7),
=60÷5,
=12;
(6)237-58+163-242,
=(237+163)-(58+242),
=400-300,
=100.