Addition or Subtraction
Rounding
Multiplication
Mental Calculations
Mental Number Comparisons
10

    368,254

+  221,567


What is   589,821 ?

10

437,228  rounded to the ten thousands place


What is 440,000?

10

3 x 8 

What is 24  ?

10

30 x 40 = 

700          7,000          1,200

What is  1,200?

10

0          4,000          8,000

What is Exactly in the Middle?

20

   509,681

- 254,323


What is  255,358  ?

20

726,853  rounded to the hundred thousands place

What is 700,000?

20

4 x 7 

What is 28 ?

20

4 x  50  =  

20          90          200

200


20

0          2,400          4,000

What is 4,000  ?

30

203,458  +  197,124

What is   400,582  ?

30

851,678 rounded to the one thousands

What is 852,000 ?

30

***** Word Problem***** 

The store sold 5 times as many candy canes in December than it sold in November.  The store sold 46 boxes of candy canes in November.  How many boxes did it sell in December?


What is 230 boxes  ?

30

1,500 + 400  = 

1,900         5,500         1,540

What is 1,900  ?

30

0          450          1,000

What is 0  ?

40

***** Word Problem *******

The refreshment stand sold 89 hot chocolates on Saturday.  It sold 36 more hot chocolates on Sunday than it had on Saturday.  How many hot chocolates did it sell on Saturday and Sunday in all?

What is  214 ?

40

516,251  rounded to the ten thousands place

What is  520,000  ?

40

18  x  35  = 

What is 630?

40

3,200 + 1,200  = 

3,400          4,400         4,200

3,400

40

4,000          4,800          5,000

What is  5,000 ?

50

   678,518

- 239,319

What is  439,199  ?

50

671,479  rounded to the one thousands place

What is 671,000  ?

50

12  x  34  = 

What is 408 ?

50

The on-line mitten store sold 624 pairs of mittens in November and 824 pairs of mittens in December.  How many more pairs of mittens did it sell in December than in November? 

What is 200  ?

50

2,000          3,000          5,000

What is  2,000  ?