题目内容
脱式计算:
(21.9-8.4×2.5)÷3;
326+9664÷32×12;
(
-
)÷
×
;
÷[
×(
-
)].
(21.9-8.4×2.5)÷3;
326+9664÷32×12;
(
| 11 |
| 15 |
| 2 |
| 3 |
| 5 |
| 8 |
| 2 |
| 5 |
| 1 |
| 6 |
| 9 |
| 14 |
| 5 |
| 6 |
| 4 |
| 9 |
(1)(21.9-8.4×2.5)÷3,
=(21.9-21)÷3,
=0.9÷3,
=0.3;
(2)326+9664÷32×12,
=326+302×12,
=326+3624,
=3950;
(3)(
-
)÷
×
,
=
×
×
,
=
×
,
=
;
(4)
÷[
×(
-
)],
=
÷[
×
],
=
÷
,
=
.
=(21.9-21)÷3,
=0.9÷3,
=0.3;
(2)326+9664÷32×12,
=326+302×12,
=326+3624,
=3950;
(3)(
| 11 |
| 15 |
| 2 |
| 3 |
| 5 |
| 8 |
| 2 |
| 5 |
=
| 1 |
| 15 |
| 8 |
| 5 |
| 2 |
| 5 |
=
| 8 |
| 75 |
| 2 |
| 5 |
=
| 16 |
| 375 |
(4)
| 1 |
| 6 |
| 9 |
| 14 |
| 5 |
| 6 |
| 4 |
| 9 |
=
| 1 |
| 6 |
| 9 |
| 14 |
| 14 |
| 36 |
=
| 1 |
| 6 |
| 1 |
| 4 |
=
| 2 |
| 3 |
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