Find 10-3. Write the subtraction fact two ways.
1 answer:
This is an exercise in fact families. A fact family consists of four related facts: two addition sentences and two subtraction sentences. The task asks for the subtraction fact written two ways.
Δ Δ Δ Δ Δ
If you remove 3 triangles, how many remain? Seven remain:
Δ Δ Δ Δ Δ
Δ Δ
So subtracting 3 from 10 gives:
Second way. Again begin with the same 10 triangles:Δ Δ Δ Δ Δ
Δ Δ Δ Δ Δ
This time remove 7 triangles; the leftovers are 3:
Δ Δ Δ
Thus subtracting 7 from 10 yields:
First way. Start with 10 objects—imagine 10 triangles:
Δ Δ Δ Δ Δ
If you remove 3 triangles, how many remain? Seven remain:
Δ Δ Δ Δ Δ
Δ Δ
So subtracting 3 from 10 gives:
Second way. Again begin with the same 10 triangles:Δ Δ Δ Δ Δ
Δ Δ Δ Δ Δ
This time remove 7 triangles; the leftovers are 3:
Δ Δ Δ
Thus subtracting 7 from 10 yields:
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Indeed, a fare of $40 is a fair charge for the cab ride.
Explanation
Sheri's cab fare totaled $32, with a gratuity rate of 20%.
The gratuity amount is:
Thus, the total cab fare including gratuity is:
Since Sheri issued a $40 check to the cab driver, it indicates she provided ($40 - $38.40) or an extra $1.60 to the cab driver. Consequently, the $40 payment is reasonable for the cab fare.
The given expression is 
Thus, in verbal form, we can express it as one eighth of a number.
Thus, in verbal form, we can express it as one eighth of a number.