题目内容
| 计算,能简算的用简便方法计算. 375+450÷18×20 | 9.47+0.58-2.47 | ||||||||||
|
|
(1)375+450÷18×20,
=375+25×20,
=375+500,
=875;
(2)9.47+0.58-2.47,
=9.47-2.47+0.58,
=7+0.58,
=7.58;
(3)
×8.4+1.6×0.7,
=0.7×(8.4+1.6),
=0.7×10,
=7;
(4)
÷[
×(
+
)],
=
÷[
×
],
=
÷
,
=
.
=375+25×20,
=375+500,
=875;
(2)9.47+0.58-2.47,
=9.47-2.47+0.58,
=7+0.58,
=7.58;
(3)
| 7 |
| 10 |
=0.7×(8.4+1.6),
=0.7×10,
=7;
(4)
| 2 |
| 9 |
| 8 |
| 21 |
| 1 |
| 3 |
| 5 |
| 12 |
=
| 2 |
| 9 |
| 8 |
| 21 |
| 3 |
| 4 |
=
| 2 |
| 9 |
| 2 |
| 7 |
=
| 7 |
| 9 |
练习册系列答案
相关题目