2025 ISAT Math Prep

Rounding

10

Round 904 to the nearest ten AND the nearest hundred.

Ten: 900

Hundred: 900

20

When rounded to the nearest ten, what is the LEAST whole number that rounds to 320?

315

30

When rounded to the nearest ten, what is the GREATEST whole number that rounds to 780?

784

40

When rounded to the nearest ten, what is the LEAST whole number that will round to 270? What is the GREATEST whole number that will round to 270?

Least: 265

Greatest: 274

50

When rounded to the nearest hundred, what is the LEAST whole number that rounds to 400? What is the GREATEST whole number that rounds to 400? 

Least: 350

Greatest: 449

Balancing Equations

10

743 - 58 = 743 - 60 + d

d = 2

20

526 - 89 = 526 - 90 + r

r = 1

30

842 - 176 = 842 - 180 + m

m = 4

40

915 - 263 = 915 - 270 + c

c = 7

50

729 - 185 = 729 - 200 + g

g = 15

3-Digit +

10

342 + 521 = ?

? = 863

20

w = 635 + 278

w = 913

30

? = 754 + 189

? = 943

40

328 + 467 = t

t = 795

50

j = 476 + 589

j = 1,065

3-Digit -

10

642 - 320 = p

p = 322

20

h = 402 - 185

h = 217

30

731 - 468 = x

x = 263

40

q = 500 - 273

q = 227

50

u = 914 - 657

u = 257

Multiplication

10

120 = a x 2

a = 60

20

f x 3 = 270

f = 90

30

480 = d x 6

d = 80

40

240 = y x 4

y = 60

50

z x 7 = 210

z = 30