The sum of the greatest 1 digit number and the smallest 2 digit number is . *

9
19
99
7. What is 10 more than 89 ? *

90
99
80
8. What is 9000 more than 1000? *

100
1000
10,000
9. Find the missing number 561 + 671 = 671 + *

560
651
561
10. What must be added to 500 to make 1500? *

500
100
1000

19

99

10,000

561

1000

Step-by-step explanation:

for the first question the answer is; 19

7...99

8...10,000

9...561

10...1000

Step-by-step explanation:

for the first question.

the greatest digit number is 9

the smallest 2 digit number is 10

the sum of bother numbers would be 19

7. it simply means add the two numbers together which would be 89+10=99

8. 9000+1000=10,000

9. 561+671=1232

since both of the equations are equivalent to each other the missing number would be 561

10. 1500-500=1000

so that is what the question means

7

step-by-step explanation:

2425

step-by-step explanation: