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

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

Directions: Solve each problem.

Question 1.
Subtract 21 from 34.
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 = __________

The quotient is 4 and the remainder is 4.

Question 4.

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 ×
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
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.

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)