Question

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1. \\(\

$$\begin{array}{r} 69 \\\\ -21 \\\\ \\hline \\end{array}$$

\\) 2. \\(\

$$\begin{array}{r} 489 \\\\ -11 \\\\ \\hline \\end{array}$$

\\) 3. \\(\

$$\begin{array}{r} 624 \\\\ -312 \\\\ \\hline \\end{array}$$

\\)

1. \\(\

$$\begin{array}{r} 62 \\\\ -35 \\\\ \\hline \\end{array}$$

\\) 5. \\(\

$$\begin{array}{r} 98 \\\\ -69 \\\\ \\hline \\end{array}$$

\\) 6. \\(\

$$\begin{array}{r} 729 \\\\ -105 \\\\ \\hline \\end{array}$$

\\)
activity 2
complete the basic or extended fact.

1. \\(1,700 - \underline{quad} = 800\\) 2. \\(130 - \underline{quad} = 80\\) 3. \\(12 - \underline{quad} = 5\\)
2. \\(\underline{quad} = 1,400 - 800\\) 5. \\(100 - \underline{quad} = 90\\) 6. \\(\underline{quad} = 140 - 70\\)

activity 3
write the fact family for the group of numbers.
model \\(70, 80, \text{and } 150\\)
\\(70 + 80 = 150\\) \\(150 - 80 = 70\\)
\\(80 + 70 = 150\\) \\(150 - 70 = 80\\)

1. \\(40, 80, \text{and } 120\\) 2. \\(400, 800, \text{and } 1,200\\)
2. \\(90, 40, \text{and } 130\\) 4. \\(900, 400, \text{and } 1,300\\)

activity 4 \\(\bullet\\) distributed practice
add.

1. \\(\

$$\begin{array}{r} 232 \\\\ +52 \\\\ \\hline \\end{array}$$

\\) 2. \\(\

$$\begin{array}{r} 524 \\\\ +124 \\\\ \\hline \\end{array}$$

\\) 3. \\(\

$$\begin{array}{r} 209 \\\\ +126 \\\\ \\hline \\end{array}$$

\\) 4. \\(\

$$\begin{array}{r} 623 \\\\ +321 \\\\ \\hline \\end{array}$$

\\)

Explanation:

Step1: Solve top subtraction problems

1. $69 - 21 = 48$
2. $489 - 11 = 478$
3. $624 - 312 = 312$
4. $62 - 35 = 27$
5. $98 - 69 = 29$
6. $729 - 105 = 624$

Step2: Solve Activity 2 missing values

1. $1700 - x = 800 \implies x = 1700 - 800 = 900$
2. $130 - x = 80 \implies x = 130 - 80 = 50$
3. $12 - x = 5 \implies x = 12 - 5 = 7$
4. $x = 1400 - 800 = 600$
5. $100 - x = 90 \implies x = 100 - 90 = 10$
6. $x = 140 - 70 = 70$

Step3: Solve Activity 3 fact families

1. $40+80=120$, $80+40=120$, $120-80=40$, $120-40=80$
2. $400+800=1200$, $800+400=1200$, $1200-800=400$, $1200-400=800$
3. $90+40=130$, $40+90=130$, $130-40=90$, $130-90=40$
4. $900+400=1300$, $400+900=1300$, $1300-400=900$, $1300-900=400$

Step4: Solve Activity 4 addition problems

1. $232 + 52 = 284$
2. $524 + 124 = 648$
3. $209 + 126 = 335$
4. $623 + 321 = 944$

Answer:

Top Subtraction:

1. $48$
2. $478$
3. $312$
4. $27$
5. $29$
6. $624$

Activity 2:

1. $900$
2. $50$
3. $7$
4. $600$
5. $10$
6. $70$

Activity 3:

1. $40+80=120$, $80+40=120$, $120-80=40$, $120-40=80$
2. $400+800=1200$, $800+400=1200$, $1200-800=400$, $1200-400=800$
3. $90+40=130$, $40+90=130$, $130-40=90$, $130-90=40$
4. $900+400=1300$, $400+900=1300$, $1300-400=900$, $1300-900=400$

Activity 4:

1. $284$
2. $648$
3. $335$
4. $944$