题目内容
脱式计算,能简算的要简算.
| 51×101 | 10.25-3.75-6.25+7.75 | ||||||||||
| 35×12+350÷70 | 3+0.7÷[(
|
|
(1)
| 5 |
| 11 |
| 7 |
| 9 |
| 7 |
| 9 |
| 6 |
| 11 |
=(
| 5 |
| 11 |
| 6 |
| 11 |
| 7 |
| 9 |
=1×
| 7 |
| 9 |
=
| 7 |
| 9 |
(2)51×101,
=51×(100+1),
=51×100+51×1,
=5100+51,
=5151;
(3)10.25-3.75-6.25+7.75,
=(10.25+7.75)-(3.75+6.25),
=18-10,
=8;
(4)35×12+350÷70,
=420+5,
=425;
(5)3+0.7÷[(
| 5 |
| 6 |
| 1 |
| 4 |
=3+0.7÷[
| 5 |
| 6 |
| 1 |
| 4 |
=3+0.7÷[20-6],
=3+0.7÷14,
=3+0.05,
=3.05;
(6)
| 1 |
| 3 |
| 6 |
| 5 |
| 9 |
| 10 |
=
| 5 |
| 18 |
| 9 |
| 10 |
=
| 1 |
| 4 |
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