Estimating Addition
Estimating Subtraction
Strategies Galore
Subtraction Mania
Addition Mania
100
3560 + 4118 Rond to the nearest thousand and add
What is 8000
100
780 - 456 = Round to the nearest hundred and subtract.
What is 300
100
what is a strategy you can you use to subtract 3000-678?
What is subtract 1 from 3000 and then subtract, and then add one back at the end. or regroup and subtract.
100
1000 - 400 =
What is 600
100
1259 + 618 =
What is 1877
200
670 + 1204 = Round to the nearest thousand and add
What is 2000
200
5698 - 3452 = Round to the nearest thousand and subtract.
What is 3000
200
What is a strategy for adding?
What is a tower, add the place values, use mental math, right to left, left to right.
200
2000 - 1054 =
What is 946
200
6963 + 2364 =
What is 9327
300
869 + 210 = Round to the nearest hundred and add
What is 1100
300
7459 - 2845 = Round to the nearest thousand and subtract.
What is 4000
300
What is a strategy you can use for subtracting?
What is mental math, tower, rename, subtract each place value, right to left.
300
782 - 340 =
What is 442
300
5000 + 1345 =
What is 6345
400
4327 + 1261 Round to the nearest ten and add
What is 5590
400
6789 - 1242 = Round to the nearest ten and subtract.
What is 5550 6790 - 1240
400
Describe to ways to solve a math problem. It starts with e and c!
What is estimate or calculate.
400
7421 - 460 =
What is 6961
400
3355 + 2745 =
What is 6100
500
6794 + 1670 = Round to the nearest thousand and add
What is 9000
500
6789 - 3456 = Round to the nearest thousand and subtract.
What is 4000
500
If you want to use some materials to help solve a math problem what could you use?
What is base ten blocks, number lines or diagrams.
500
650 - 243 =
What is 407
500
1500 + 320 =
What is 1820
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