Investigations Unit 7 Review

Each tower has 10 cubes. How many cubes are there in all?

• 40

• 90

• 80

• 100

Solve the following equation: 30+50=

• 80

• 40

• 20

• 10

How many tens are in 80?

• 4 tens

• 0 tens

• 8 tens

• 6 tens

How many tens are in 30?

• 3 tens

• 0 tens

• 4 tens

• 9 tens

Solve the problem: 40+_____ = 60

• 40

• 20

• 100

• 90

Solve the following problem: 70+____= 80

• 10

• 20

• 30

• 50

Solve the following problem: 10+ _____= 50

• 40

• 30

• 60

• 20

Solve the following problem: 30-10=

• 20

• 10

• 30

• 25

Solve the problem: 70-40=

• 30

• 20

• 100

• 3

Select the correct symbols to compare both of these numbers

50______ 45

• >

• <

• =