题目内容
计算下面各题(写出必要的过程)
①2
+3
+4
+5
+6
②3.8÷
+60%×7.2-0.6
③
+
+
+
④[(
-
+2.6÷26)÷(
-
)]÷9.375.
①2
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 6 |
②3.8÷
| 5 |
| 3 |
③
| 1 |
| 6×8 |
| 1 |
| 10×12 |
| 1 |
| 12×14 |
| 1 |
| 14×16 |
④[(
| 9 |
| 10 |
| 17 |
| 72 |
| 25 |
| 27 |
| 1 |
| 9 |
①2
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 6 |
=(2+
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 6 |
=(2+3+4+5+6)+(
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 6 |
=20+1
| 9 |
| 20 |
=21
| 9 |
| 20 |
②3.8÷
| 5 |
| 3 |
=3.8×
| 3 |
| 5 |
=3.8×0.6+0.6×7.2-0.6,
=(3.8+7.2-1)×0.6,
=10×0.6,
=6;
③
| 1 |
| 6×8 |
| 1 |
| 10×12 |
| 1 |
| 12×14 |
| 1 |
| 14×16 |
=
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 14 |
| 1 |
| 14 |
| 1 |
| 16 |
=
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 16 |
=
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 10 |
| 1 |
| 8 |
| 1 |
| 16 |
=
| 1 |
| 2 |
| 4 |
| 15 |
| 3 |
| 16 |
=
| 1 |
| 2 |
| 19 |
| 240 |
=
| 19 |
| 480 |
④[(
| 9 |
| 10 |
| 17 |
| 72 |
| 25 |
| 27 |
| 1 |
| 9 |
=[(
| 9 |
| 10 |
| 17 |
| 72 |
| 25 |
| 27 |
| 1 |
| 9 |
=[(1-
| 17 |
| 72 |
| 25 |
| 27 |
| 1 |
| 9 |
=[
| 55 |
| 72 |
| 22 |
| 27 |
=
| 15 |
| 16 |
=0.1.
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