题目内容
脱式计算.
①168.1÷(4.3×2-0.4)
②(
-
)÷(6×
)
③1.6÷(
+2.5×80%)
④[
-(
-
)]÷
.
①168.1÷(4.3×2-0.4)
②(
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 4 |
③1.6÷(
| 2 |
| 5 |
④[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
①168.1÷(4.3×2-0.4),
=168.1÷(8.6-0.4),
=168.1÷8.2,
=20.5;
②(
-
)÷(6×
),
=(
-
)÷
,
=
×
,
=
;
③1.6÷(
+2.5×80%),
=1.6÷(0.4+2.5×0.8),
=1.6÷(0.4+2),
=1.6÷2.4,
=
;
④[
-(
-
)]÷
,
=[
-(
-
)]÷
,
=[
-
]÷
,
=
×
,
=
.
=168.1÷(8.6-0.4),
=168.1÷8.2,
=20.5;
②(
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 4 |
=(
| 11 |
| 12 |
| 9 |
| 12 |
| 3 |
| 2 |
=
| 1 |
| 6 |
| 2 |
| 3 |
=
| 1 |
| 9 |
③1.6÷(
| 2 |
| 5 |
=1.6÷(0.4+2.5×0.8),
=1.6÷(0.4+2),
=1.6÷2.4,
=
| 2 |
| 3 |
④[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
=[
| 1 |
| 2 |
| 15 |
| 20 |
| 12 |
| 20 |
| 7 |
| 10 |
=[
| 1 |
| 2 |
| 3 |
| 20 |
| 7 |
| 10 |
=
| 7 |
| 20 |
| 10 |
| 7 |
=
| 1 |
| 2 |
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