题目内容
脱式计算,能简算的写出主要简算步骤.
| 0.97×99+0.97 | 3.69×[1÷(2.1-2.09)] |
|
(1)0.97×99+0.97,
=0.97×(99+1),
=0.97×100,
=97;
(2)3.69×[1÷(2.1-2.09)],
=3.69×[1÷0.01],
=3.69×100,
=369;
(3)
+
+
+
,
=(
+
)+(
+
),
=
+1,
=1
.
=0.97×(99+1),
=0.97×100,
=97;
(2)3.69×[1÷(2.1-2.09)],
=3.69×[1÷0.01],
=3.69×100,
=369;
(3)
| 1 |
| 9 |
| 2 |
| 15 |
| 7 |
| 9 |
| 13 |
| 15 |
=(
| 1 |
| 9 |
| 7 |
| 9 |
| 13 |
| 15 |
| 2 |
| 15 |
=
| 8 |
| 9 |
=1
| 8 |
| 9 |
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