Ufumbuzi - Kurudisha urefu
Maelezo kwa hatua
1. Andika tena nambari kutoka juu kwenda chini, zimepangwa kwa thamani zao za eneo
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 1 | 2 | 8 | . | 0 | 4 | ||
| - | 8 | . | 2 | 8 | 7 | ||
| . |
Weka sifuri katika mahali pa idadi tupu:
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| . |
2. Toa nambari kwa kutumia njia ndefu ya kutoa
Kwa sababu digit ya juu (0) katika safu ya alfu ni ndogo sana kupata tofauti chanya, azima 1 kutoka kwa digit (4) katika nafasi inayofuata ya namba ambayo inakuwa (3) na kupata (10).
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| . |
Toa nambari kwenye safu ya alfu kutoka kwa namba juu:
10-0-7=3
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| . | 3 |
Kwa sababu tarakimu ya juu (3) katika safu ya mia ni ndogo sana kupata tofauti chanya, kukopa 1 kutoka kwa idadi ya kushoto (8.0) ambayo inakuwa (7.9) na kupata (13).
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 7 | 9 | 13 | |||||
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| . | 3 |
Toa nambari kwenye safu ya mia kutoka kwa namba juu:
13-8=5
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 7 | 9 | 13 | |||||
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| . | 5 | 3 |
Toa nambari kwenye safu ya kumi kutoka kwa namba juu:
9-2=7
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 7 | 9 | 13 | |||||
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| . | 7 | 5 | 3 |
Kwa sababu digit ya juu (7) katika safu ya moja ni ndogo sana kupata tofauti chanya, azima 1 kutoka kwa digit (2) katika nafasi inayofuata ya namba ambayo inakuwa (1) na kupata (17).
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 1 | 17 | ||||||
| 7 | 9 | 13 | |||||
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| . | 7 | 5 | 3 |
Toa nambari kwenye safu ya moja kutoka kwa namba juu:
17-8=9
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 1 | 17 | ||||||
| 7 | 9 | 13 | |||||
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| 9 | . | 7 | 5 | 3 |
Andika 1 kwenye eneo la kumi.
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 1 | 17 | ||||||
| 7 | 9 | 13 | |||||
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| 1 | 9 | . | 7 | 5 | 3 |
Andika 1 kwenye eneo la mia.
| Thamani ya mahali | mia | kumi | moja | . | kumi | mia | alfu |
| 1 | 17 | ||||||
| 7 | 9 | 13 | |||||
| 3 | 10 | ||||||
| 1 | 2 | 8 | . | 0 | 4 | 0 | |
| - | 8 | . | 2 | 8 | 7 | ||
| 1 | 1 | 9 | . | 7 | 5 | 3 |
Jibu ni: 119.753
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