题目内容
计算下面各题,能简算的要简算.
8×
+8×
69×
1200-198
÷
+
×
×(1÷
-
÷1)+
.
8×
| 2 |
| 5 |
| 3 |
| 5 |
69×
| 5 |
| 23 |
1200-198
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
| 4 |
| 7 |
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 6 |
(1)8×
+8×
,
=(
+
)×8,
=1×8,
=8;
(2)69×
=15;
(3)1200-198,
=1200-(200-2),
=1200-200+2,
=1002;
(4)
÷
+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(5)
×(1÷
-
÷1)+
,
=
×(
-
)+
,
=
×
+
,
=
+
,
=
.
| 2 |
| 5 |
| 3 |
| 5 |
=(
| 2 |
| 5 |
| 3 |
| 5 |
=1×8,
=8;
(2)69×
| 5 |
| 23 |
(3)1200-198,
=1200-(200-2),
=1200-200+2,
=1002;
(4)
| 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 |
(5)
| 4 |
| 7 |
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 6 |
=
| 4 |
| 7 |
| 4 |
| 3 |
| 1 |
| 4 |
| 5 |
| 6 |
=
| 4 |
| 7 |
| 13 |
| 12 |
| 5 |
| 6 |
=
| 13 |
| 21 |
| 5 |
| 6 |
=
| 61 |
| 42 |
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