You can use a model such as a bar diagram to keep track of the numbers.

You cannot solve one- and two-step problems using addition or subtraction.

In 43 – 18, it is easier to subtract 20 than 18.

You can use compensation to make numbers that are easier to subtract.

To find 95 – 38, you can break apart 38 as 30 + 8.

To find 43 – 27, you can break apart 27 as 2 + 7.

You can use place value to break apart the number you are subtracting.

You can break apart 8 to find 55 – 8. One way is 8 = 6 + 3.

You can break apart the number you are subtracting to find the difference.

You can add up from 28 to subtract. Place 28 on the number line first.

You can break apart the number you are subtracting into tens and ones.

23 is the same as 2 ones and 3 tens.

Tommy had some baseball cards. Frank gave Tommy 7 more cards. Now Tommy has 16 cards. How many baseball cards did Tommy have at first?

Mr. William’s class collected some cans to recycle on Tuesday. They collected 19 more cans on Wednesday. The class collected 45 cans in all. How many cans did the class collect on Tuesday?

Ghazal took out 10 books from the library on Monday. She took out 5 books from the library on Tuesday. Then she returned 4 books on Wednesday. How many books does Ghazal have on Thursday?

There are 20 peas on Jana’s plate. Jana eats 15 peas. Then Jana’s mother puts 5 more peas on her plate. How many peas are on Jana’s plate now?

Rateel put 11 photos in the album. Mariam put some more in the album. There are 23 photos in the album in all. How many photos did Mariam add?

Rahaf puts 10 hair clips in the bag. Malak puts 8 hair clips in the bag. Then Rahaf takes out 8 hair clips from the bag. How many hair clips are in the bag now?