Ib tsev neeg rho qhov tseeb yog ib pawg pawg ntawm cov lej tseeb uas siv peb tus lej tib yamCov tsev neeg rho tawm qhov tseeb kuj suav nrog ntxiv, uas yog qhov thim rov qab lossis rov ua haujlwm ntawm kev rho tawm. Qhov tseeb tsev neeg ntawm 2, 3, thiab 5 yuav muaj plaub qhov sib npaug: 2 + 3=5, 3 + 2=5, 5 - 3=2, thiab 5 - 2=3.
Qhov tseeb ntxiv lossis rho tawm yog dab tsi?
Kev tshaj tawm. Txhais. Ib tsev neeg qhov tseeb yog ib pawg ntawm lej qhov tseeb uas siv tib tus lej. Piv txwv li, koj tuaj yeem tsim ib tsev neeg qhov tseeb uas siv peb tus lej 3, 10, thiab 13: 10 + 3=13, 3 + 10=13, 13 - 10=3, thiab 13 - 3=10.
Dab tsi yog qhov tseeb rho tawm txog 10?
Subtraction facts yog ob peb ua ke ntawm cov zauv sau ua rho tawm suav nrog ib tug rho kos npe '-' thiab ib tug sib npaug kos npe '='. Piv txwv li, 10 – 5= 5 yog qhov tseeb rho tawm. Nws yog qhov tseeb rho tawm ntawm 10, vim 10 yog tus lej uas tau muab rho tawm.
Dab tsi yog ob txoj hauv kev los sau qhov tseeb rho tawm?
Thaum qhov sib ntxiv / rho tawm, koj siv peb tus lej thiab tau txais four facts Piv txwv li, koj tuaj yeem tsim ib tsev neeg qhov tseeb uas siv peb tus lej 10, 2, thiab 12: 10 + 2=12, 2 + 10=12, 12 − 10=2, and 12 − 2=10. Thawj tus lej hauv kab lus rho tawm yog qhov minuend (min-yoo-end).
Dab tsi yog qhov tseeb rho tawm rau 20?
Dab tsi yog qhov tseeb rho tawm rau 20?
- Piv txwv, peb rho 8 ntawm 20 thiab peb ntxiv 10 rau tus lej uas ntxiv rau 8 ua 10. Peb ntxiv 10 rau 2 kom tau cov lus teb ntawm 12.
- 5 + 5=10 thiab li,
- 5 + 15=20.
- 3 + 7=10 thiab li,
- 3 + 17=20.
