Show:
Addition
Subtraction
Subtraction Across Zeros
Estimating Sums and Differences
Potpourri
100
456 + 291 =
What is 747?
100
7,256 - 4,184 =
What is 3,072
100
804 - 385 =
What is 419?
100
Round to the nearest ten: 46 + 38 =
What is 90?
100
23 + 67 = ______ + 23.
What is 67?
200
334 posters printed on Monday, 238 posters pringed on Tuesday, 495 posters printed on Wednesday. How many posters printed in all?
What is 1,067?
200
Joe saw 427 birds at the park. Mary saw 515 birds. How many more birds did Mary see than Joe?
What is 88 birds?
200
600 - 324 =
What is 276?
200
Round to the nearest hundred: 347 - 189 =
What is 100?
200
There are 347 fans that want Mr. Helgeson's autograph on a picture. 259 fans want it on a black and white picture. The rest of the fans want it on a color picture. How many fans want a color picture? Draw a bar diagram to answer this problem and then solve it.
What is 88 fans want color? (Look at board for correct bar diagram.)
300
34,895 + 23,654 =
What is 58,549?
300
Cindy had 819 pennies in her piggy bank. If she gave her brother 469 pennies, how many pennies did Cindy have left?
What is 350 pennies?
300
3,075 - 1,486 =
What is 1,589?
300
Round to the nearest thousand: 5,612 - 2,498 =
What is 4,000?
300
75 people like chocolate ice cream. 23 people like vanilla ice cream. 44 people like strawberry ice cream. How many people all together voted for ice cream. Draw a bar diagram to solve this problem and then answer it.
What is 142 people. (Look at board for correct bar diagram.)
400
45,382 + 397 + 2,608 =
What is 48,387?
400
Carl got 47,376 points playing a video game, and Stephen got 39,589 points. How many more points did Carl get than Stephen?
What is 7,787 points?
400
7,000 - 3,482 =
What is 3,518
400
Round to the nearest ten: 237,432 + 185,869 =
What is 423,300?
400
There are 3,564 leaves total. 1,698 of them are brown. All of the rest are not brown. How many leaves are not brown? Draw a bar diagram to solve this problem and then answer it.
What is 1,866 leaves are not brown. (Look at board for correct bar diagram.)
500
285,999 + 567,896+ 214,985 =
What is 1,068,880?
500
345,256 - 176,897 =
What is 168,359?
500
30,005 - 12,648 =
What is 17,357?
500
Round to the nearest ten thousand: 678,442 - 349,651 =
What is 330,000?
500
To check a subtraction problem, you can add. What mathematical concept is the called?
What is inverse operations?