Question

I need help understanding this and help with the problems...

Answer 1

1. 15+37=?

• 15=10+5 (given on the diagram)
• 37=30+7 (given on the diagram)
• add digits to digits 5+7=12=10+2
• add tens to tens 10+30+10=50
• add tens and digits 50+2=52.

2. 22+49=?

• 22=20+2 (given on the diagram)
• 49=40+9 (given on the diagram)
• add digits to digits 2+9=11=10+1
• add tens to tens 20+40+10=70
• add tens and digits 70+1=71.

3. 38+26=?

• 38=30+8 (given on the diagram)
• 26=20+6 (given on the diagram)
• add digits to digits 8+6=14=10+4
• add tens to tens 30+20+10=60
• add tens and digits 60+4=64.

Answer: 1) 52; 2) 71; 3) 64.

Answer 2

Number 1 is 52 number 2 is 71 and number 3 is 64