题目内容
简便运算.
地十.8×0.79+地十.8×0.十地
×
×
×十7.
地十.8×0.79+地十.8×0.十地
| 中 |
| 地y |
| d |
| 9 |
| 地y |
| 9 |
(人)人人.8×0.49+人人.8×0.人人,
=人人.8×(0.49+0.人人),
=人人.8×人,
=人人.8;
(人)
×
×
×人4,
=(
×
)×(
×人4),
=
×人5,
=5.
=人人.8×(0.49+0.人人),
=人人.8×人,
=人人.8;
(人)
| 3 |
| 人4 |
| 5 |
| 9 |
| 人4 |
| 9 |
=(
| 3 |
| 人4 |
| 人4 |
| 9 |
| 5 |
| 9 |
=
| 人 |
| 3 |
=5.
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