题目内容
计算:①(-16.8)÷(-3);
②(-
)÷(-
);
③(+5
) ÷(-3
);
④(+1.25)÷(-0.5)÷(-
);
⑤-18÷(+3.25)÷(-2
).
②(-
| 5 |
| 4 |
| 4 |
| 5 |
③(+5
| 1 |
| 3 |
| 1 |
| 3 |
④(+1.25)÷(-0.5)÷(-
| 5 |
| 8 |
⑤-18÷(+3.25)÷(-2
| 1 |
| 4 |
①原式=16.8÷3,
=16.8×
,
=5.6;
②原式=
÷
,
=
×
,
=
;
③原式=-
÷
,
=-
×
,
=-
;
④原式=1.25÷0.5÷
,
=
×2×
,
=4;
⑤原式=18÷3.25÷2
,
=18×
×
,
=
.
=16.8×
| 1 |
| 3 |
=5.6;
②原式=
| 5 |
| 4 |
| 4 |
| 5 |
=
| 5 |
| 4 |
| 5 |
| 4 |
=
| 25 |
| 16 |
③原式=-
| 16 |
| 3 |
| 10 |
| 3 |
=-
| 16 |
| 3 |
| 3 |
| 10 |
=-
| 8 |
| 5 |
④原式=1.25÷0.5÷
| 5 |
| 8 |
=
| 5 |
| 4 |
| 8 |
| 5 |
=4;
⑤原式=18÷3.25÷2
| 1 |
| 4 |
=18×
| 4 |
| 13 |
| 4 |
| 9 |
=
| 32 |
| 13 |
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