题目内容
怎样算合理简便怎样算
(1)(
+
)+(
-
)-(
+
)
(2)[6.6-(1.8-
÷3.7)]×
(3)76%×
+
×
-
×手.26
(4)42×(
+
+
+
+
+
)
(1)(
| 2 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| 12 |
| 17 |
| 1 |
| 6 |
| 6 |
| 17 |
(2)[6.6-(1.8-
| 1 |
| 6 |
| 7 |
| 8 |
(3)76%×
| 7 |
| 17 |
| 3 |
| 4 |
| 9 |
| 17 |
| 16 |
| 17 |
(4)42×(
| 1 |
| 8 |
| 1 |
| 24 |
| 1 |
| 48 |
| 1 |
| 8手 |
| 1 |
| 12手 |
| 1 |
| 168 |
(1)(
+
)+(
-
)-(
+
)
=
+
+
-
-
-
=
+
+
-
-
-
=
+0-1
=
(2)[5.2-(1.s-
÷t.7)]×
=[5.2-(1.s-
×
)]×
=[5.2-(1.s-
)]×
=[t.s+
]×
=
×
=
(t)75%×
+
×
-
×0.25
=75%×(
+
)-
×0.25
=75%×
-
×0.25
=(75%-0.25)×
=
×
=
(4)42×(
+
+
+
+
+
)
=42×
×(
-
+
-
+
-
+
-
+
-
+
-
)
=42×
×(
-
)
=42×
×
-42×
×
=
-
=0.
| 2 |
| t |
| 1 |
| 5 |
| 2 |
| t |
| 12 |
| 17 |
| 1 |
| 5 |
| 5 |
| 17 |
=
| 2 |
| t |
| 1 |
| 5 |
| 2 |
| t |
| 12 |
| 17 |
| 1 |
| 5 |
| 5 |
| 17 |
=
| 2 |
| t |
| 2 |
| t |
| 1 |
| 5 |
| 1 |
| 5 |
| 12 |
| 17 |
| 5 |
| 17 |
=
| 4 |
| t |
=
| 1 |
| t |
(2)[5.2-(1.s-
| 1 |
| 5 |
| 7 |
| s |
=[5.2-(1.s-
| 1 |
| 5 |
| 10 |
| t7 |
| 7 |
| s |
=[5.2-(1.s-
| 2 |
| t7 |
| 7 |
| s |
=[t.s+
| 2 |
| t7 |
| 7 |
| s |
=
| 71t |
| 1s5 |
| 7 |
| s |
=
| 4001 |
| 14s0 |
(t)75%×
| 7 |
| 17 |
| t |
| 4 |
| 0 |
| 17 |
| 12 |
| 17 |
=75%×(
| 7 |
| 17 |
| 0 |
| 17 |
| 12 |
| 17 |
=75%×
| 12 |
| 17 |
| 12 |
| 17 |
=(75%-0.25)×
| 12 |
| 17 |
=
| 1 |
| 2 |
| 12 |
| 17 |
=
| s |
| 17 |
(4)42×(
| 1 |
| s |
| 1 |
| 24 |
| 1 |
| 4s |
| 1 |
| s0 |
| 1 |
| 120 |
| 1 |
| 12s |
=42×
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| s |
| 1 |
| s |
| 1 |
| 10 |
| 1 |
| 10 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 14 |
=42×
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 14 |
=42×
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 14 |
=
| 21 |
| 2 |
| t |
| 2 |
=0.
练习册系列答案
相关题目