Rounding
Unknown Numbers
Let's Solve
100

What is 67 rounded to the nearest ten

70

100

2 x 5 x W = 80

What unknown number does W represent?

W = 8

100

721 - 56 = L

L = 665

200

What is 67 rounded to the nearest hundred

100

200

3 x 5 x R = 30

What unknown number does R represent?

R = 2

200

332 + 8 = 300 + P

P = 40

300

What is 534 rounded to the nearest hundred?

500

300

What unknown number makes this equation true?

84 + 258 = K

K = 342

300

430 - 60 = 400 - M

M = 30

400

Which of these numbers rounded to the nearest ten is 70?

71, 65, 63, 77

71 & 65

400

What unknown number makes this equation true?

30 x 6 = J

J = 180

400

Adelina has 30 nickels. Kelechi has 8 dimes. Who has more money? How much more?

Adelina has 70 cents more than Kelechi

500

When rounding to the nearest ten, what is the least whole number that rounds to 980?

Double points: What is the greatest whole number?

975

Double points: 984

500

What unknown number makes this equation true?

240 = N x 3

N = 80

500

928 - 94 = 928 - 100 + Z

Z = 6