Ufumbuzi - Kurudisha urefu
Maelezo kwa hatua
1. Andika tena nambari kutoka juu kwenda chini, zimepangwa kwa thamani zao za eneo
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 5 | 0 | 0 | 0 | . | 6 | ||
| - | 4 | 3 | 2 | . | 8 | 5 | |
| . |
Weka sifuri katika mahali pa idadi tupu:
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| . |
2. Toa nambari kwa kutumia njia ndefu ya kutoa
Kwa sababu digit ya juu (0) katika safu ya mia ni ndogo sana kupata tofauti chanya, azima 1 kutoka kwa digit (6) katika nafasi inayofuata ya namba ambayo inakuwa (5) na kupata (10).
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 5 | 10 | ||||||
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| . |
Toa nambari kwenye safu ya mia kutoka kwa namba juu:
10-0-5=5
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 5 | 10 | ||||||
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| . | 5 |
Kwa sababu tarakimu ya juu (5) katika safu ya kumi ni ndogo sana kupata tofauti chanya, kukopa 1 kutoka kwa idadi ya kushoto (5,000) ambayo inakuwa (4,999) na kupata (15).
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 4 | 9 | 9 | 15 | ||||
| 5 | 10 | ||||||
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| . | 5 |
Toa nambari kwenye safu ya kumi kutoka kwa namba juu:
15-8=7
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 4 | 9 | 9 | 15 | ||||
| 5 | 10 | ||||||
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| . | 7 | 5 |
Toa nambari kwenye safu ya moja kutoka kwa namba juu:
9-2=7
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 4 | 9 | 9 | 15 | ||||
| 5 | 10 | ||||||
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| 7 | . | 7 | 5 |
Toa nambari kwenye safu ya kumi kutoka kwa namba juu:
9-3=6
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 4 | 9 | 9 | 15 | ||||
| 5 | 10 | ||||||
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| 6 | 7 | . | 7 | 5 |
Toa nambari kwenye safu ya mia kutoka kwa namba juu:
9-4=5
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 4 | 9 | 9 | 15 | ||||
| 5 | 10 | ||||||
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| 5 | 6 | 7 | . | 7 | 5 |
Andika 4 kwenye eneo la alfu.
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi | mia |
| 4 | 9 | 9 | 15 | ||||
| 5 | 10 | ||||||
| 5 | 0 | 0 | 0 | . | 6 | 0 | |
| - | 4 | 3 | 2 | . | 8 | 5 | |
| 4 | 5 | 6 | 7 | . | 7 | 5 |
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