Rounding to add and subtract

Front

Estimate this sum: 56 + 43

Back

100

Front

Estimate the sum of 37 + 99 by rounding to the nearest tens.

Back

140

Front

Sum means to __________.

Back

Add

Front

What is the best estimate of 123 + 143 to the nearest 10?

Back

260

Front

Estimate the sum of 120 + 190 by rounding to the nearest hundreds.

Back

300

Front

Rounding means to adjust a number to the nearest __________.

Back

Ten or hundred

Front

When rounding 78 to the nearest ten, it becomes __________.

Back

80

Front

What is 45 rounded to the nearest ten?

Back

50

Front

If you add 20 + 30, what is the sum?

Back

50

Front

What is the nearest hundred to 250?

Back

300