问题
解答题
计算下面各题 (1)1.25×2.4 (2)95×99+95 (3)
(4)12.125-(12.125-8.6) |
答案
(1)1.25×2.4
=1.25×0.8×3
=1×3
=3;
(2)95×99+95
=95×(99+1)
=95×100
=9500;
(3)
÷7 9
+11 5
×2 9 5 11
=
×7 9
+5 11
×2 9 5 11
=(
+7 9
)×2 9 5 11
=
;5 11
(4)12.125-(12.125-8.6)
=12.125-12.125+8.6
=8.6.