题目内容
| 脱式计算.(能简便的要简便) 60×(
|
| ||||||||||||
8×40%+
|
| ||||||||||||
6.23×[1÷(
| (
| ||||||||||||
86×
|
|
(1)60×(
-
)
=60×
-
×60
=84-40
=44;
(2)
÷
+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)8×40%+
÷
=8×
+
×2
=(8+2)×
=10×
=4;
(4)
+
×
÷2
=
+
×
×
=
+
=
;
(5)6.23×[1÷(
-2.09)]
=6.23×[1÷(
-
)]
=6.23×[1÷
]
=6.23×100
=623;
(6)(
+
)÷
=
×
=
;
(7)86×
=(87-1)×
=87×
-
=23-
=22
;
(8)
-
-
-
=
-(
+
+
)
=
-1
=
.
| 7 |
| 5 |
| 2 |
| 3 |
=60×
| 7 |
| 5 |
| 2 |
| 3 |
=84-40
=44;
(2)
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
=
| 7 |
| 9 |
| 5 |
| 11 |
| 2 |
| 9 |
| 5 |
| 11 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 11 |
=1×
| 5 |
| 11 |
=
| 5 |
| 11 |
(3)8×40%+
| 2 |
| 5 |
| 1 |
| 2 |
=8×
| 2 |
| 5 |
| 2 |
| 5 |
=(8+2)×
| 2 |
| 5 |
=10×
| 2 |
| 5 |
=4;
(4)
| 1 |
| 6 |
| 3 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 6 |
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 2 |
=
| 1 |
| 6 |
| 1 |
| 4 |
=
| 5 |
| 12 |
(5)6.23×[1÷(
| 21 |
| 10 |
=6.23×[1÷(
| 21 |
| 10 |
| 209 |
| 100 |
=6.23×[1÷
| 1 |
| 100 |
=6.23×100
=623;
(6)(
| 7 |
| 8 |
| 13 |
| 16 |
| 13 |
| 16 |
=
| 27 |
| 16 |
| 16 |
| 13 |
=
| 27 |
| 13 |
(7)86×
| 23 |
| 87 |
=(87-1)×
| 23 |
| 87 |
=87×
| 23 |
| 87 |
| 23 |
| 87 |
=23-
| 23 |
| 87 |
=22
| 64 |
| 87 |
(8)
| 8 |
| 5 |
| 7 |
| 15 |
| 6 |
| 15 |
| 2 |
| 15 |
=
| 8 |
| 5 |
| 7 |
| 15 |
| 6 |
| 15 |
| 2 |
| 15 |
=
| 8 |
| 5 |
=
| 3 |
| 5 |
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