Question

lesson check

1. what is the sum?

27 + 12=

1. what is the sum?

17 + 35=
spiral review

1. what is the value of the underlined digit?

25

1. what number has the same value as 12 tens?
2. vera has 7 connecting cubes. greg has 4 connecting cubes. how many connecting cubes do they have?
3. juan is painting a picture of a tree. first he paints 15 leaves. then he paints 23 more leaves. how many leaves does juan paint?

Explanation:

Step1: Add numbers in question 5

$27+12 = 39$

Step2: Add numbers in question 6

$17 + 35=52$

Step3: Find value of under - lined digit in question 7

The under - lined digit 5 in 25 represents 5 ones, so the value is 5.

Step4: Calculate value of 12 tens in question 8

$12\times10 = 120$

Step5: Add cubes in question 9

$7 + 4=11$

Step6: Add leaves in question 10

$15+23 = 38$

Answer:

1. 39
2. 52
3. 5
4. 120
5. 11
6. 38