Final Answer:
The task is to solve all the “Doubles Plus One” addition problems on the four sheets. Each problem follows the pattern: double a number, then add one (e.g., 4 + 5 = 4 + 4 + 1 = 9). The correct answers are:
Sheet 1:
4+5=9, 10+11=21, 2+3=5,
8+7=15, 9+8=17, 7+8=15,
4+3=7, 5+4=9, 5+6=11,
11+10=21, 6+5=11, 8+7=15,
4+5=9, 2+1=3, 11+10=21,
7+6=13, 3+2=5, 1+2=3,
8+9=17, 8+9=17, 5+6=11,
7+8=15, 1+2=3, 6+7=13,
9+8=17, 7+6=13, 6+5=11,
10+11=21, 6+7=13, 2+1=3,
5+6=11, 3+4=7, 6+5=11,
2+3=5, 3+2=5, 3+4=7
Sheet 2:
4+5=9, 10+11=21, 2+3=5,
8+7=15, 9+8=17, 7+8=15,
6+5=11, 5+4=9, 5+6=11,
11+10=21, 6+5=11, 8+7=15,
6+5=11, 2+1=3, 11+10=21,
7+6=13, 3+2=5, 1+2=3,
8+9=17, 8+9=17, 5+6=11,
7+8=15, 1+2=3, 6+7=13,
9+8=17, 7+6=13, 6+5=11,
10+11=21, 6+7=13, 2+1=3,
5+6=11, 3+4=7, 6+5=11,
2+3=5, 3+2=5, 3+4=7
Sheet 3:
2+1=3, 11+10=21,
10+11=21, 6+5=11,
6+7=13, 9+8=17,
6+5=11, 11+10=21,
3+4=7, 6+7=13,
5+6=11, 8+7=15,
6+7=13, 3+2=5,
6+5=11, 7+6=13,
3+4=7, 8+7=15,
9+8=17, 5+4=9,
7+6=13, 7+8=15,
5+6=11, 7+6=13
Sheet 4:
8+7=15, 1+2=3,
6+5=11, 3+2=5,
9+8=17, 7+6=13,
11+10=21, 1+2=3,
6+5=11, 3+4=7,
2+3=5, 3+2=5,
7+8=15, 6+5=11,
6+7=13, 11+10=21,
10+11=21, 5+6=11,
9+8=17, 3+4=7,
8+9=17, 5+6=11
Parent Tip: Review the logic above to help your child master the concept of doubles and doubles plus one worksheet.
