Ufumbuzi - Kurudisha urefu
7.192
Maelezo kwa hatua
1. Andika tena nambari kutoka juu kwenda chini, zimepangwa kwa thamani zao za eneo
| Thamani ya mahali | moja | . | kumi | mia | alfu |
| 8 | |||||
| 0 | . | 8 | |||
| - | 0 | . | 0 | 0 | 8 |
| . |
Weka sifuri katika mahali pa idadi tupu:
| Thamani ya mahali | moja | . | kumi | mia | alfu |
| 8 | . | 0 | 0 | 0 | |
| 0 | . | 8 | 0 | 0 | |
| - | 0 | . | 0 | 0 | 8 |
| . |
2. Toa nambari kwa kutumia njia ndefu ya kutoa
Kwa sababu tarakimu ya juu (0) katika safu ya alfu ni ndogo sana kupata tofauti chanya, kukopa 1 kutoka kwa idadi ya kushoto (8.00) ambayo inakuwa (7.99) na kupata (10).
| Thamani ya mahali | moja | . | kumi | mia | alfu |
| 7 | 9 | 9 | 10 | ||
| 8 | . | 0 | 0 | 0 | |
| 0 | . | 8 | 0 | 0 | |
| - | 0 | . | 0 | 0 | 8 |
| . |
Toa nambari kwenye safu ya alfu kutoka kwa namba juu:
10-0-0-8=2
| Thamani ya mahali | moja | . | kumi | mia | alfu |
| 7 | 9 | 9 | 10 | ||
| 8 | . | 0 | 0 | 0 | |
| 0 | . | 8 | 0 | 0 | |
| - | 0 | . | 0 | 0 | 8 |
| . | 2 |
Toa nambari kwenye safu ya mia kutoka kwa namba juu:
9-0-0=9
| Thamani ya mahali | moja | . | kumi | mia | alfu |
| 7 | 9 | 9 | 10 | ||
| 8 | . | 0 | 0 | 0 | |
| 0 | . | 8 | 0 | 0 | |
| - | 0 | . | 0 | 0 | 8 |
| . | 9 | 2 |
Toa nambari kwenye safu ya kumi kutoka kwa namba juu:
9-8-0=1
| Thamani ya mahali | moja | . | kumi | mia | alfu |
| 7 | 9 | 9 | 10 | ||
| 8 | . | 0 | 0 | 0 | |
| 0 | . | 8 | 0 | 0 | |
| - | 0 | . | 0 | 0 | 8 |
| . | 1 | 9 | 2 |
Toa nambari kwenye safu ya moja kutoka kwa namba juu:
7-0-0=7
| Thamani ya mahali | moja | . | kumi | mia | alfu |
| 7 | 9 | 9 | 10 | ||
| 8 | . | 0 | 0 | 0 | |
| 0 | . | 8 | 0 | 0 | |
| - | 0 | . | 0 | 0 | 8 |
| 7 | . | 1 | 9 | 2 |
Jibu ni: 7.192
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