By accessing our **180 Days of Math for Fourth Grade Answers Key Day 128 **regularly, students can get better problem-solving skills.

## 180 Days of Math for Fourth Grade Answers Key Day 128

**Directions: Solve each problem.**

Question 1.

Subtract 21 from 34.

Answer:

34

-21

13

Thus when we subtract 21 from 34 we get the result as 13.

Question 2.

Write \(\frac{9}{10}\) as a percentage.

Answer: \(\frac{9}{10}\) as a percent is 90%.

Question 3.

24 ÷ 5 = __________

Answer:

The quotient is 4 and the remainder is 4.

Question 4.

Answer:

The quotient is 4 and the remainder is 0.

Question 5.

Round 789 to the nearest hundred.

Answer: 789 to the nearest hundred is 800.

Question 6.

7 × 8 = 56 ×

Answer:

Let the missing number be x.

7 × 8 = 56 × x

56 = 56 × x

x = 56/56

x = 1

Question 7.

I put 700 mL of water in the cup. Next I put a toy in the cup. How much water was displaced by the toy?

___________ mL

Answer:

Given info,

I put 700 mL of water in the cup. Next, I put a toy in the cup.

From the figure we can see the measure is 900 ml

900 – 700 = 200 ml

200 ml water was displaced by the toy.

Question 8.

Calculate the perimeter.

Answer:

Figure 1:

P = 2(L + W)

P = 2(6 + 4)

P = 2 × 10

P = 20 cm

Figure 2:

P = 2(L + W)

P = 2 (4 + 2)

P = 2 × 6

P = 12 cm

P = 20 cm + 12 cm

P = 32 cm

Question 9.

Which numbers are inside the rectangle, circle, and triangle?

Answer: 6 is the number that is inside the rectangle, circle, and triangle.

Question 10.

Plot each set of coordinates to make a triangle. (D, 7); (B, 3); (G, 3)

Answer: