题目内容
脱式计算:
(1)92×0.54+4
×9
(2)4.75×1.36×0.375÷(4
×1
×
)
(3)
+
+
+
+
(4)
.
(1)92×0.54+4
| 3 |
| 5 |
| 1 |
| 5 |
(2)4.75×1.36×0.375÷(4
| 3 |
| 4 |
| 9 |
| 25 |
| 3 |
| 8 |
(3)
| 1 |
| 3×5 |
| 1 |
| 5×7 |
| 1 |
| 7×9 |
| 1 |
| 9×11 |
| 1 |
| 11×13 |
(4)
| 567+345×566 |
| 567×345+222 |
(1)92×0.54+4
×9
,
=9.2×5.4+4.6×9.2,
=9.2×(5.4+4.6),
=9.2×10,
=92;
(2)4.75×1.36×0.375÷(4
×1
×
),
=(4.75×1.36×0.375)÷(4.75×1.36×0.375),
=1;
(3)
+
+
+
+
,
=(
-
)×
+(
-
)×
+(
+
)×
+(
-
)×
+(
-
)×
,
=(
-
+
-
+
+
+
-
+
-
)×
,
=(
-
)×
,
=
×
,
=
;
(4)
,
=
,
=
,
=
,
=1.
| 3 |
| 5 |
| 1 |
| 5 |
=9.2×5.4+4.6×9.2,
=9.2×(5.4+4.6),
=9.2×10,
=92;
(2)4.75×1.36×0.375÷(4
| 3 |
| 4 |
| 9 |
| 25 |
| 3 |
| 8 |
=(4.75×1.36×0.375)÷(4.75×1.36×0.375),
=1;
(3)
| 1 |
| 3×5 |
| 1 |
| 5×7 |
| 1 |
| 7×9 |
| 1 |
| 9×11 |
| 1 |
| 11×13 |
=(
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 2 |
| 1 |
| 7 |
| 1 |
| 9 |
| 1 |
| 2 |
| 1 |
| 9 |
| 1 |
| 11 |
| 1 |
| 2 |
| 1 |
| 11 |
| 1 |
| 13 |
| 1 |
| 2 |
=(
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 11 |
| 1 |
| 11 |
| 1 |
| 13 |
| 1 |
| 2 |
=(
| 1 |
| 3 |
| 1 |
| 13 |
| 1 |
| 2 |
=
| 10 |
| 39 |
| 1 |
| 2 |
=
| 5 |
| 39 |
(4)
| 567+345×566 |
| 567×345+222 |
=
| 567+345×(567-1) |
| 567×345+222 |
=
| 567+345×567-345 |
| 567×345+222 |
=
| 345×567+222 |
| 345×567+222 |
=1.
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