题目内容
| 请写出过程 ①99×99+99 | ②10×0.1×100 | ③8÷8÷0.125 | ④37×39-29×37 | ||||||||
| ⑤1.8÷2.7÷0.6×2.7 | ⑥47×99 | ⑦0.5+[
| ⑧[(
|
①99×99+99,
=99×(99+1),
=99×100,
=9900;
②10×0.1×100,
=1×100,
=100;
③8÷8÷0.125,
=8÷(8×0.125),
=8÷1,
=8;
④37×39-29×37,
=37×(39-29),
=37×10,
=370;
⑤1.8÷2.7÷0.6×2.7,
=1.8÷0.6,
=3;
⑥47×99,
=47×(100-1),
=47×100-47,
=4700-47,
=4653;
⑦0.5+[
÷(0.15+
)],
=0.5+[
÷(0.15+0.45)],
=0.5+(
÷
),
=
+
,
=
,
=
;
⑧[(
+2.1)×
]÷0.9,
=(
×
+2.1×
)÷
,
=(
+
)×
,
=
×
+
×
,
=
+
,
=
,
=1
.
=99×(99+1),
=99×100,
=9900;
②10×0.1×100,
=1×100,
=100;
③8÷8÷0.125,
=8÷(8×0.125),
=8÷1,
=8;
④37×39-29×37,
=37×(39-29),
=37×10,
=370;
⑤1.8÷2.7÷0.6×2.7,
=1.8÷0.6,
=3;
⑥47×99,
=47×(100-1),
=47×100-47,
=4700-47,
=4653;
⑦0.5+[
| 5 |
| 6 |
| 9 |
| 20 |
=0.5+[
| 5 |
| 6 |
=0.5+(
| 5 |
| 6 |
| 3 |
| 5 |
=
| 9 |
| 18 |
| 25 |
| 18 |
=
| 34 |
| 18 |
=
| 17 |
| 9 |
⑧[(
| 3 |
| 20 |
| 4 |
| 7 |
=(
| 3 |
| 20 |
| 4 |
| 7 |
| 4 |
| 7 |
| 9 |
| 10 |
=(
| 3 |
| 35 |
| 6 |
| 5 |
| 10 |
| 9 |
=
| 3 |
| 35 |
| 10 |
| 9 |
| 6 |
| 5 |
| 10 |
| 9 |
=
| 2 |
| 21 |
| 4 |
| 3 |
=
| 10 |
| 7 |
=1
| 3 |
| 7 |
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