What comes before 769?

Question

ScanSolve AI Tutor · Accepted Answer

Here are the solutions for Activity 4: Repeated addition / subtraction.

Subtract the first 25.
$$ 150 - 25 = 125 $$
Subtract the second 25.
$$ 125 - 25 = 100 $$
Subtract the third 25.
$$ 100 - 25 = 75 $$ The answer is $\boxed{\text{}75\text{}}$
2. : $160 + 20 + 20 + 20 =$
Add the first 20.
$$ 160 + 20 = 180 $$
Add the second 20.
$$ 180 + 20 = 200 $$
Add the third 20.
$$ 200 + 20 = 220 $$ The answer is $\boxed{\text{}220\text{}}$
3. : $15 + 15 + 15 + 15 + 15 =$
This is $15 \times 5$ .
$$ 15 \times 5 = 75 $$ The answer is $\boxed{\text{}75\text{}}$
4. : $75 + 5 + 5 + 5 + 5 + 5 =$
Count the number of 5s being added (there are five 5s).
$$ 5 \times 5 = 25 $$
Add this sum to 75.
$$ 75 + 25 = 100 $$ The answer is $\boxed{\text{}100\text{}}$
5. : $21 + 7 + 7 + 7 + 7 + 7 =$
Count the number of 7s being added (there are five 7s).
$$ 5 \times 7 = 35 $$
Add this sum to 21.
$$ 21 + 35 = 56 $$ The answer is $\boxed{\text{}56\text{}}$
6. : $600 - 100 - 100 - 100 - 100 =$
Count the number of 100s being subtracted (there are four 100s).
$$ 4 \times 100 = 400 $$
Subtract this total from 600.
$$ 600 - 400 = 200 $$ The answer is $\boxed{\text{}200\text{}}$
7. : $63 - 3 - 3 - 3 - 3 - 3 - 3 =$
Count the number of 3s being subtracted (there are six 3s).
$$ 6 \times 3 = 18 $$
Subtract this total from 63.
$$ 63 - 18 = 45 $$ The answer is $\boxed{\text{}45\text{}}$
8. : $750 - 50 - 50 - 50 - 50 =$
Count the number of 50s being subtracted (there are four 50s).
$$ 4 \times 50 = 200 $$

$$
750 - 200 = 550
$$
The answer is $\boxed{\text{}550\text{}}$

Step-by-step solution