George added 3 971 + 4 056 in his head. He thought the answer was 79 127.

What error did he make?

• George multiplied the numbers together

• George accidentally saw 3 971 as 39 971

• When George added the tens together and got ’12 tens’, he forgot to carry

• George got mixed up

Add these numbers mentally 5 150 + 3 730

• 8 484

• 8 884

• 81 289

• 8 880

What are you being asked to find when calculating 4 763 + 1 098?

• The product

• The sum

• Factors

• The difference

______ + 875 = 4 032

• 4 907

• 3 263

• 4 843

• 3 157

What does the circled number represent?

• 1

• 10

• 100

• 17

What number should replace the star?

• 8

• 6

• 7

• 3

What number should replace the star?

• 3

• 13

• 4

• 14

What number should replace the star?

• 8

• 81

• 9

• 7

What number should replace the star?

• 0

• 2

• 10

• 9

Add these numbers mentally 95 103 + 9 416 =

• 189 263

• 914 519

• 189 109

• 104 519