Ufumbuzi - Kurudisha urefu
31.51
Maelezo kwa hatua
1. Andika tena nambari kutoka juu kwenda chini, zimepangwa kwa thamani zao za eneo
| Thamani ya mahali | kumi | moja | . | kumi | mia |
| 3 | 8 | . | 7 | 1 | |
| 4 | |||||
| - | 3 | . | 2 | ||
| . |
Weka sifuri katika mahali pa idadi tupu:
| Thamani ya mahali | kumi | moja | . | kumi | mia |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| . |
2. Toa nambari kwa kutumia njia ndefu ya kutoa
Toa nambari kwenye safu ya mia kutoka kwa namba juu:
1-0-0=1
| Thamani ya mahali | kumi | moja | . | kumi | mia |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| . | 1 |
Toa nambari kwenye safu ya kumi kutoka kwa namba juu:
7-0-2=5
| Thamani ya mahali | kumi | moja | . | kumi | mia |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| . | 5 | 1 |
Toa nambari kwenye safu ya moja kutoka kwa namba juu:
8-4-3=1
| Thamani ya mahali | kumi | moja | . | kumi | mia |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| 1 | . | 5 | 1 |
Andika 3 kwenye eneo la kumi.
| Thamani ya mahali | kumi | moja | . | kumi | mia |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| 3 | 1 | . | 5 | 1 |
Jibu ni: 31.51
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