题目内容
计算:3.6×2
÷16.9÷(3
×1.16)×1.3=
.
| 8 |
| 25 |
| 3 |
| 5 |
| 2 |
| 13 |
| 2 |
| 13 |
分析:先把算式中的带小数和带分数化成假分数,再把除以一个数改写成乘这个数的倒数,进而先约分,再计算得解.
解答:解:3.6×2
÷16.9÷(3
×1.16)×1.3,
=
×
÷
÷(
×
)×
,
=
×
×
×
×
×
,
=
;
故答案为:
.
| 8 |
| 25 |
| 3 |
| 5 |
=
| 18 |
| 5 |
| 58 |
| 25 |
| 169 |
| 10 |
| 18 |
| 5 |
| 29 |
| 25 |
| 13 |
| 10 |
=
| 18 |
| 5 |
| 58 |
| 25 |
| 10 |
| 169 |
| 5 |
| 18 |
| 25 |
| 29 |
| 13 |
| 10 |
=
| 2 |
| 13 |
故答案为:
| 2 |
| 13 |
点评:解决此题要根据数据和运算符号的特点,灵活运用所学的简便方法进行计算.
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(1)981÷3 -57 |
(2)745 -282+255 |
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(3)425 +175×6 |
(4)254 +167+333 |
计算能巧算就巧算:
|
(1)981÷3 -57 |
(2)745 -282+255 |
|
(3)425 +175×6 |
(4)254 +167+333 |