Solve Two-Step Story Problems

Match the vocabulary word with its definition.

• rounding

• A set of steps that works every time as long as the steps are carried out correctly.

• algorithm

• A specific way of writing a number as a sum of hundreds, tens, and ones.

  Example: 482 = 400+80+2

• expanded form

• A formal way to say which number a given number is closer to. For example, for 182, the number 180 is the closest multiple of ten and 200 is the closest multiple of a hundred.

445 + 160 > 500.

• True

• False

Answer explanation

445 + 160 = 605

235 + 215 < 400.

• True

• False

Answer explanation

235 + 215 = 450

535 + 215 > 800.

• True

• False

Answer explanation

535 + 215 = 750

235 + 215 < 500.

• True

• False

Answer explanation

235 + 215 = 450

385 + 412 > 700.

• True

• False

Answer explanation

385 + 412 = 797

532 + 165 < 700.

• True

• False

Answer explanation

532 + 165 = 697

Adrian has 142 collector cards. He sells 39 of them. Then, he buys 92 more. He estimates he has about 200 cards now. Do you agree or disagree?

• Agree

• Disagree

Answer explanation

Jade has 387 collector cards. She gave 105 cards to a friend. Then, her sister gave her 88 more cards. Estimate to the nearest hundred how many cards Jade has now.

(a)  

Answer explanation

Match each tape diagram to one of the following equations

a

b

385 + (5 x 6)

385 + (2 x 7)