Subtracting 6, 7, 8, 9
Replace the minuend by a sum of convenient addends, one of which equals the subtrahend. Then the other addend is left. Ukrainian grade 1.
- أوكرانيا: الصف ١
- روسيا: الصف ١
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الدليل
A studio for Ukrainian grade 1 (the NUS textbook «Getting ready to subtract 6, 7, 8, 9» and «Subtracting 6, 7, 8, 9»). What is left if you subtract from the sum of two numbers a number equal to one of the addends? The other addend: ٦ + ٤ − ٤ = ٦.
To subtract 6, 7, 8 or 9, work in three steps. 1. Write the minuend as a sum of convenient addends. 2. Subtract from the sum the number equal to one of the addends; the other addend is left. 3. Name the result.
For example: ٩ − ٦ = (٣ + ٦) − ٦ = ٣. Here the minuend 9 is written as the sum 3 + 6, because one addend equals the subtrahend 6. In the tasks you build such a line from cards: you place the numbers and change the sign + or − by tapping it.