Mental math story problems

Write a take-away story about 16 and 7 and solve it.

Find the missing numbers: 8 + ? = 17 and 6 + ? = 11.

Count on the 120 chart from 100 to 120.

Solve: 104 + 10 and 119 − 10.

Aya had 18 pencils. She has 9 now. How many did she give away?