Ufumbuzi - Kurudisha urefu
818.8
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 |
| 1 | 0 | 0 | 6 | . | 8 | |
| - | 1 | 8 | 8 | |||
| . |
Weka sifuri katika mahali pa idadi tupu:
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi |
| 1 | 0 | 0 | 6 | . | 8 | |
| - | 1 | 8 | 8 | . | 0 | |
| . |
2. Toa nambari kwa kutumia njia ndefu ya kutoa
Toa nambari kwenye safu ya kumi kutoka kwa namba juu:
8-0=8
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi |
| 1 | 0 | 0 | 6 | . | 8 | |
| - | 1 | 8 | 8 | . | 0 | |
| . | 8 |
Kwa sababu tarakimu ya juu (6) katika safu ya moja ni ndogo sana kupata tofauti chanya, kukopa 1 kutoka kwa idadi ya kushoto (100) ambayo inakuwa (099) na kupata (16).
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi |
| 0 | 9 | 9 | 16 | |||
| 1 | 0 | 0 | 6 | . | 8 | |
| - | 1 | 8 | 8 | . | 0 | |
| . | 8 |
Toa nambari kwenye safu ya moja kutoka kwa namba juu:
16-8=8
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi |
| 0 | 9 | 9 | 16 | |||
| 1 | 0 | 0 | 6 | . | 8 | |
| - | 1 | 8 | 8 | . | 0 | |
| 8 | . | 8 |
Toa nambari kwenye safu ya kumi kutoka kwa namba juu:
9-8=1
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi |
| 0 | 9 | 9 | 16 | |||
| 1 | 0 | 0 | 6 | . | 8 | |
| - | 1 | 8 | 8 | . | 0 | |
| 1 | 8 | . | 8 |
Toa nambari kwenye safu ya mia kutoka kwa namba juu:
9-1=8
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi |
| 0 | 9 | 9 | 16 | |||
| 1 | 0 | 0 | 6 | . | 8 | |
| - | 1 | 8 | 8 | . | 0 | |
| 8 | 1 | 8 | . | 8 |
Andika 0 kwenye eneo la alfu.
| Thamani ya mahali | alfu | mia | kumi | moja | . | kumi |
| 0 | 9 | 9 | 16 | |||
| 1 | 0 | 0 | 6 | . | 8 | |
| - | 1 | 8 | 8 | . | 0 | |
| 0 | 8 | 1 | 8 | . | 8 |
Jibu ni: 818.8
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