题目内容
| 能简算就要简算. ①
| ②1.25×7×0.8 | ③7.28-3.14+1.72-2.86 | ||||||||||||||||||||||||
④
| ⑤(
| ⑥
|
①
×
+
÷
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
②1.25×7×0.8
=1.25×0.8×7,
=1×7,
=7;
③7.28-3.14+1.72-2.86
=7.28+1.72-(3.14+2.86),
=9-6,
=3;
④
÷[
-(
+
)]
=
÷[
-
],
=
÷
,
=
;
⑤(
+
-
)×36
=
×36+
×36-
×36,
=3+4-6,
=1;
⑥
+
+
+
+
=
+
+
+
+
,
=
.
| 5 |
| 8 |
| 11 |
| 10 |
| 3 |
| 8 |
| 10 |
| 11 |
=
| 5 |
| 8 |
| 11 |
| 10 |
| 3 |
| 8 |
| 11 |
| 10 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
| 11 |
| 10 |
=1×
| 11 |
| 10 |
=
| 11 |
| 10 |
②1.25×7×0.8
=1.25×0.8×7,
=1×7,
=7;
③7.28-3.14+1.72-2.86
=7.28+1.72-(3.14+2.86),
=9-6,
=3;
④
| 11 |
| 8 |
| 9 |
| 10 |
| 2 |
| 5 |
| 1 |
| 4 |
=
| 11 |
| 8 |
| 9 |
| 10 |
| 13 |
| 20 |
=
| 11 |
| 8 |
| 1 |
| 4 |
=
| 11 |
| 2 |
⑤(
| 1 |
| 12 |
| 1 |
| 9 |
| 3 |
| 18 |
=
| 1 |
| 12 |
| 1 |
| 9 |
| 3 |
| 18 |
=3+4-6,
=1;
⑥
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
=
| 16 |
| 32 |
| 8 |
| 32 |
| 4 |
| 32 |
| 2 |
| 32 |
| 1 |
| 32 |
=
| 31 |
| 32 |
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