By accessing our **180 Days of Math for Fourth Grade Answers Key Day 80 **regularly, students can get better problem-solving skills.

## 180 Days of Math for Fourth Grade Answers Key Day 80

**Directions Solve each problem.**

Question 1.

24 – 6 = ____

Answer:

Explanation:

Working each column from right to left

6 is greater than 4 so you must regroup:

Take 1 from 2, so 2 becomes 1.

Add 10 to 4, so 4 becomes 14.

Question 2.

Answer:

Explanation:

The product of 9 and 7 is 63

9 x 7 = 63

Question 3.

Answer:

Explanation:

Answer:

= 5 R 0

= 5

10 divided by 2 equals

5 with a remainder of 0

Question 4.

87 ÷ 10 = ____

Answer:

Explanation:

We have the equation:

87 ÷ 10 = 8

Calculated to 0 decimal places.

Quotient is 8 and the remainder is 7

Question 5.

Write the largest 4-digit numeral using 1, 0, 7, and 9.

_____________________

Answer:

9710

Explanation:

Write the given number from greatest to least

that will be the greatest number

Question 6.

× 8 = 32

Answer:

4 x 8 = 32

Explanation:

32 ÷ 4 = 8

Multiplication and division are inversely proportional equations.

Question 7.

Is the area of the cover of a book measured in cm^{2} or m^{2}?

_____________________

Answer:

cm^{2}

Explanation:

The area of the cover of a book is measured in cm^{2}

Because the length and width of the book size will me small

1 meter = 100 cm

Question 8.

Would you use a thermometer or a ruler to measure temperature?

_____________________

Answer:

thermometer

Explanation:

Air temperature is measured with thermometers.

Common thermometers consist of a glass rod with a very thin tube in it.

The tube contains a liquid that is supplied from a reservoir, or “bulb,” at the base of the thermometer.

Question 9.

Complete around the axis of symmetry.

Answer:

Explanation:

Axis of symmetry is a line that divides an object into two equal halves,

thereby creating a mirror-like reflection of either side of the object.

Question 10.

If the shaded area is equal to one, what is the area of the crossed region?

Answer:

2 square units is the area of the crossed region

Explanation:

The shaded are has 4 square units

4 square units = 1

The crosses region has 8 square units

8 ÷ 4 = 2