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To make solving easier, we break down 29 into more comfortable numbers, preferably round ones.
We obtain:
We multiply 6 by each of the terms in parentheses:
We solve the exercises in parentheses and obtain:
174
\( 140-70= \)
Breaking it down makes the math easier in your head! Multiplying by 30 is simple (just add a zero to 6×3), then subtract 6. This method helps you avoid mistakes with larger numbers.
Absolutely! You could use . Both methods work - choose whichever feels easier for you!
Look carefully at how you broke down the number! If you wrote 30-1, you subtract. If you wrote 20+9, you add. The sign in your breakdown tells you what to do.
For mental math, yes! It's much faster to calculate 6×30-6 in your head than to work through 6×29 step by step. With practice, you'll solve these problems in seconds!
Check that you multiplied 6 by each part inside the parentheses. For 6×(30-1), you should get two separate multiplications: 6×30 and 6×1, then combine them.
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