题目内容
神机妙算:
2842÷14+74×3
÷(
-
)
3.6×99+3.6
÷(
×
)
×
+
÷
72×(
-
)
2842÷14+74×3
| 8 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
3.6×99+3.6
| 3 |
| 4 |
| 3 |
| 5 |
| 3 |
| 8 |
| 4 |
| 5 |
| 6 |
| 7 |
| 1 |
| 7 |
| 5 |
| 4 |
72×(
| 5 |
| 9 |
| 5 |
| 12 |
(1)2842÷14+74×3
=2848÷7÷2+74×3,
=203+222,
=425;
(2)
÷(
-
)
=
×12,
=10
;
(3)3.6×99+3.6
=(99+1)×3.6,
=100×3.6,
=360;
(4)
÷(
×
)
=
×
,
=
;
(5)
×
+
÷
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(6)72×(
-
)
=72×
-72×
,
=40-30,
=10.
=2848÷7÷2+74×3,
=203+222,
=425;
(2)
| 8 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
=
| 8 |
| 9 |
=10
| 2 |
| 3 |
(3)3.6×99+3.6
=(99+1)×3.6,
=100×3.6,
=360;
(4)
| 3 |
| 4 |
| 3 |
| 5 |
| 3 |
| 8 |
=
| 3 |
| 4 |
| 40 |
| 9 |
=
| 10 |
| 3 |
(5)
| 4 |
| 5 |
| 6 |
| 7 |
| 1 |
| 7 |
| 5 |
| 4 |
=
| 4 |
| 5 |
| 6 |
| 7 |
| 1 |
| 7 |
| 4 |
| 5 |
=(
| 6 |
| 7 |
| 1 |
| 7 |
| 4 |
| 5 |
=1×
| 4 |
| 5 |
=
| 4 |
| 5 |
(6)72×(
| 5 |
| 9 |
| 5 |
| 12 |
=72×
| 5 |
| 9 |
| 5 |
| 12 |
=40-30,
=10.
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