Year 5 Addition and Subtraction - end of unit quiz

Choose the correct explanation for why Tiny is wrong.

• Tiny forgot to exchange tens and hundreds column.

• He added only 4 thousand, when he should have added 40,000.

• His answer is incorrect.

• Because Tiny is always wrong.

For this calculation choose the explanations that fit the best and are the easiest to calculate.

• Start with 60,000, add 2002 to get 62,002, then remove the 2 to get 62,000. Finally, add 3,800.

• Add the ones, then the tens, then the hundreds, then the thousands and then the ten thousands to get the answer.

• Round 2002 down to 2000, or simple -2. Add 2000 to the number = 65,800. Then add the 2 back again: 65,802

• The only two columns that change are the thousands and the ones, so just change these columns mentally, i.e. 3+2 thousand is 5,000, 0 + 2 is 2, so the new answer is 65,802.

Which is the correct addition calculation to get the answer 78,529?

• 54137 + 24592 =

• 54,937+ 23,592=

• 46,131+ 23,592 =

• 54637 + 24592 =

Annie estimates the answer to 22,223 + 5,867 by rounding both numbers to the nearest 1,000. Which calculation shows the correct rounding to the nearest 1,000.

• 20,000 + 5,000 = 25,000

• 22,200 + 5,800 = 28,000

• 22,000 + 6,000 = 28,000

• 21,000+ 6,000 = 27,000

Choose the statements that are correct.

• Teddy's number is 98 less than 465.

• Alex's number is 99 more than 465.

• Teddy's number is 98 more than 465.

• Alex's number is 99 less than 465.

Which calculations are correct to find the different between Teddy's number and Alex's number? Choose 2 methods.

• 465+98 = 563

  465-99 = 366

  563-366 = 197

• 465+100= 565

  465-100= 365

  565-365= 200

  200+3 = 203

• 98 + 99 = 197

• 465 + 99 - 98 = 466

Does Mr Rose have enough money left after buying the dishwasher?

Choose the correct answer AND the correct explanation.

• YES

• NO.

• Because if you add 700+400+300 = 1,400, so he has enough money.

• Because the total is more than 1,500, it is 1,507.

Reorder the following calculations in ascending order.

• 403+308

• 413+308

• 413+380

• 318+430

Identify the calculation that has the same answer as 5321 - 309

• 6,321 - 1,309 =

• 6921 - 3009 =

• 5,561 - 549 =

• 5322 - 310 =

What are the missing numbers?

_720 + 4_0 = 3140

• 2 and 2

• 1 + 4

• 6 + 2

• 5 + 2