Find the difference between 67 and 42.

A florist sold 20 tulips and 10 roses. How many flowers did she sell altogether?

 $\Delta\$  + 4 = 10
What is the missing number?

Ron had 12 red and green marbles.

There are 5 red marbles.

How many green marbles are there?

35 -  $\Delta$  = 32

Selly had 50 sweets.

She gave away 13 sweets to her friends.

How many sweets were left?

28 + 11 = _____

38 +  $\Delta$  = 40

Quincy has 28 stickers.

Dom has 20 more stickers than Quincy.

How many stickers does Dom have?

 $\Delta$  - 27 = 48
What is the missing number?

39 - 27 = ______