Use addition to subtract tens 11-4 grade one

What is the missing number?

30 + 40 = 70

, so 70 – 30 =.......

• 40

• 30

• 70

Which number is missing?

20 + ____ = 80, so 80 – 20 = ____

• 40

• 60

• 50

Hussein has 80 miles to drive today.

He has already driven 30 miles.

How many miles does he have left to drive?

• 80 - 30 = 30

• 80 - 30 = 40

• 80 - 30 = 50

What is the missing number?

20 + 30 = 50

, so 50 – 30 =.......

• 40

• 20

• 70

What is the missing number?

50 + 40 = 90

, so 90 – 50 =.......

• 40

• 30

• 90